Why Is My Laptop Running So Slowly?

A slow laptop does not automatically need replacing. The cause may be as simple as an unfinished update, too many startup applications, a nearly full drive, an overloaded browser or the wrong power mode. Other cases point to insufficient memory, overheating, a failing hard drive or hardware that no longer suits modern software.

The fastest way to fix the problem is to identify what “slow” means and check the laptop while the delay is happening. Random cleanup tools and dramatic factory resets can waste time without addressing the cause.

Work through these checks in order. The instructions cover Windows laptops first, with Mac and Chromebook guidance where the tools differ.

Before you begin

Save important work and back up files that exist only on the laptop. Performance trouble can occasionally be an early sign of a storage or cooling fault, and troubleshooting may involve updates or restarts.

Stop using the laptop, disconnect its charger if safe and arrange professional assistance if you notice:

A swollen battery, lifted trackpad or case separating at the seams.
A burning smell, smoke, sparking or unusual electrical heat.
Liquid inside the computer.
Repeated clicking or grinding from a mechanical hard drive.
Unexpected shutdowns accompanied by extreme heat.
A damaged charging cable, plug or battery.

Do not open a swollen battery, spray cleaner into vents or use a vacuum cleaner directly on internal components. Do not install random “driver updater”, registry-cleaner or performance-booster programs. They can introduce advertising, malware or new faults.

Identify exactly when it is slow

The timing narrows the cause. Write down what you were doing, how long the delay lasted and whether it happens on battery, while charging or after waking from sleep.

Slow only after startup: too many startup applications, updates, antivirus scanning or cloud syncing.
Slow in one application: application fault, oversized project, extension, update or insufficient hardware for that software.
Slow only online: Wi-Fi, internet, browser or website problem rather than the whole laptop.
Slow after several hours: heat, memory pressure, a leaking application or too many open tasks.
Slow on battery: battery-saver or low-power mode.
Slow during file access: full, busy or failing storage.
Suddenly slow everywhere: update activity, malware, thermal trouble, a failing drive or a newly installed application.
Always slow: weak hardware, insufficient RAM, mechanical storage or an ageing operating system.

If only websites and streaming are slow but local settings and documents open normally, test the internet connection separately. A faster processor will not fix poor Wi-Fi.

Step 1: perform a proper restart

Save your files and select Restart from the operating system's power menu. Do not simply close the lid. Sleep preserves the current session, including stuck processes and memory usage, while a restart reloads the system.

After restarting, allow five to ten minutes for login items, security checks, cloud syncing and update work to settle. Then open only the application that was slow and test again.

If performance immediately improves but deteriorates each day, a startup item, browser tab or application may be accumulating resources. Continue with the checks below rather than relying on daily forced shutdowns.

Step 2: disconnect unnecessary accessories

Disconnect external drives, docks, hubs, printers, capture devices and other non-essential USB or Thunderbolt accessories. Leave the approved charger connected if required and test the laptop by itself.

A failing drive, incompatible dock, damaged cable or peripheral driver can delay startup and file access. If the problem disappears, reconnect one device at a time until it returns.

Eject storage devices properly before disconnecting them. Do not remove a drive while files, backups or updates are being written.

Step 3: check Task Manager on Windows

Press Ctrl + Shift + Esc to open Task Manager. Select Processes and observe the CPU, Memory, Disk and Network columns while the slowdown occurs. Click a column heading to sort by the highest use.

CPU near 100 per cent: a process is using most available processing capacity.
Memory consistently near capacity: too many applications, too many browser tabs or insufficient RAM.
Disk near 100 per cent: updates, syncing, antivirus activity, insufficient memory or a slow or failing drive.
High network use: downloads, updates, backups or cloud syncing may be consuming the connection.

Do not end a process merely because its name is unfamiliar. Search the official application or Windows documentation first. Closing an essential system process can create instability or force a restart.

Use the Performance section to confirm installed memory, drive type and general resource behaviour. A laptop with a mechanical hard drive or only 4GB to 8GB of RAM may show hardware limitations even when nothing is technically broken.

Step 4: check Activity Monitor on a Mac

Open Activity Monitor from Applications, Utilities. Select CPU and sort by the percentage column to identify an application using sustained processing power. Select Memory and inspect the Memory Pressure graph.

Apple explains that green memory pressure means memory is being used efficiently. Frequent yellow or red pressure during ordinary work suggests that applications are exceeding available RAM. Swap Used shows how much startup-disk space macOS is using as substitute memory.

Quit an application normally before using Force Quit. Some Apple processes can temporarily work hard during photo analysis, search indexing, syncing or an operating-system update. Allow legitimate maintenance to finish where practical.

Step 5: close excess browser tabs and extensions

Modern websites can use substantial processor and memory resources. Video meetings, social feeds, cloud design tools, online spreadsheets and advertising-heavy pages behave more like applications than simple documents.

Close tabs you do not need and fully quit the browser. Reopen it with one ordinary page and test. If performance improves, restore tabs in small groups rather than reopening the entire previous session.

Disable extensions temporarily, especially coupon tools, download managers, security add-ons from unknown publishers and anything installed immediately before the problem began. Use the browser's built-in task manager where available to identify a demanding tab or extension.

Clearing the browser cache can resolve a damaged site cache, but deleting all cookies signs you out and rarely fixes system-wide slowness. Do not erase browsing data indiscriminately.

Step 6: free storage space

A nearly full system drive leaves less room for updates, temporary files, caches and virtual memory. Check Settings, System, Storage on Windows; System Settings, General, Storage on macOS; or Settings, Device, Storage management on a Chromebook.

Remove or move files you recognise:

Large downloads and old installers.
Videos or game captures no longer required.
Applications and games you no longer use.
Duplicate project exports.
Temporary files identified by the operating system.
Offline cloud files that are safely stored elsewhere.

Emptying the recycle bin or Trash is necessary before its contents become free space. Keep roughly 10 to 20 per cent of the system drive available where practical. Do not manually delete unfamiliar system folders.

Microsoft provides Storage Sense and temporary-file controls for Windows. Use built-in tools before downloading a third-party cleaner.

Step 7: reduce startup applications

Too many programs launching at sign-in can make a capable laptop feel slow for several minutes and consume memory all day.

On Windows

Open Task Manager, select Startup apps and review the list. Disable optional programs that do not need to start automatically, such as game launchers, meeting tools and vendor utilities you use rarely.

On macOS

Open System Settings, General, Login Items. Remove unnecessary items under Open at Login and review applications permitted to run in the background.

Do not disable security, backup, touchpad, graphics or workplace-management software without understanding its purpose. Restart after making a small group of changes and test again.

Step 8: allow updates and syncing to finish

Operating-system updates, application updates, photo-library analysis, search indexing and cloud synchronisation can temporarily use CPU, storage and network resources. This is common after a major update, first sign-in or migration to a new computer.

Connect the approved charger and a stable internet connection, save your work and let the laptop remain awake for a while. Check Windows Update, Software Update on macOS or About ChromeOS to confirm whether a restart is pending.

Do not interrupt firmware or BIOS updates. A progress indicator may pause for long periods. Follow the laptop manufacturer's exact instructions and keep power connected.

If the same update repeatedly fails or resource use never settles, note the update name or error and use the operating-system vendor's specific support steps.

Step 9: update the operating system and applications

Install supported operating-system, browser and application updates. Updates can correct performance bugs, security issues and compatibility problems. Restart when requested.

For Windows hardware drivers and BIOS updates, start with Windows Update and the exact laptop manufacturer's Australian support page. Avoid unofficial driver sites and automated updater utilities.

Windows 10 support ended on 14 October 2025. A Windows 10 laptop may continue operating, but an unsupported system no longer receives ordinary security fixes from Microsoft. Check whether it supports Windows 11 or whether replacement is the safer long-term option.

For Chromebooks, check the model's Auto Update Expiration date. Hardware may still work after automatic updates end, but the device no longer has the same supported software life.

Step 10: scan for malware

A sudden unexplained slowdown, pop-ups, browser redirects, unfamiliar applications or persistent high resource use can indicate unwanted software or malware.

On Windows 11, open Windows Security, Virus & threat protection and run a Quick scan. If concern remains, open Scan options and use a Full scan or Microsoft Defender Offline scan. Save work first because an offline scan restarts the computer.

Do not install several antivirus products simultaneously. Multiple real-time scanners can conflict and slow the laptop. Remove scareware or expired trial suites using the publisher's official removal instructions.

On a Mac or Chromebook, review recently installed applications and browser extensions. Download software only from trusted publishers and official stores or websites.

Step 11: check the power mode

A laptop may reduce processor performance on battery, in Battery Saver, Low Power Mode or a quiet manufacturer profile. Test with the correct charger connected and confirm the power mode.

On Windows, open Settings, System, Power & battery and review Power mode. Balanced is appropriate for most use. Best performance may help demanding work but increases heat, fan noise and battery consumption.

On a Mac, check Battery settings for Low Power Mode. Manufacturer utilities on gaming laptops may provide silent, balanced, performance or turbo profiles. Some high-performance modes work only with the original high-wattage charger.

If performance drops only on battery, that can be expected behaviour. A severely degraded battery or unrecognised low-wattage charger may also limit performance and requires exact-model diagnosis.

Step 12: check for overheating

Processors reduce speed when temperature limits are reached. A laptop that starts fast and slows during gaming, rendering or long calls may be thermally throttling.

Place it on a hard, flat surface. Do not use it on a bed, blanket or cushion that blocks vents. Check that visible vents are not packed with dust and that fans can be heard changing speed under load.

Shut down and disconnect power before gently cleaning exterior vents according to the manufacturer's instructions. Do not push tools through vents or spin fans aggressively with compressed air. Internal cleaning and thermal-compound replacement should be handled by a competent technician if disassembly is required.

A cooling pad may improve airflow in some designs, but it does not repair a failed fan, blocked heatsink or dried thermal interface.

Step 13: test whether one application is responsible

If the laptop is slow only in one program, check that application's requirements, updates, plugins and project settings. Try a small new document or project. If the small file works normally, the original file or workload may exceed the laptop's resources.

Disable third-party plugins temporarily and reset the application's preferences only after recording custom settings. Hardware acceleration can help or hurt depending on the GPU and driver; use the software publisher's guidance.

Reinstalling one affected application is much less disruptive than resetting the entire computer. Back up templates, presets, licences and local project data first.

Step 14: test with a clean startup or safe mode

Safe mode and clean-startup testing help separate basic operating-system behaviour from third-party services and login items.

On Windows, use Microsoft's clean boot or Safe Mode instructions for the installed Windows version. Record every change so normal startup can be restored. Do not permanently disable Microsoft services at random.

On an Apple silicon Mac, shut down, hold the power button until startup options appear, select the startup volume, hold Shift and choose Continue in Safe Mode. Intel Mac steps differ. Apple's support page provides the correct sequence.

If performance is normal in safe mode, a login item, extension, driver or third-party service is likely involved. Re-enable items methodically until the slowdown returns.

Step 15: check memory pressure

Eight gigabytes of RAM can become restrictive with modern browsers, video calls and several applications. When physical memory fills, the operating system uses compression and storage as substitute memory, which can make switching tasks slow.

On Windows, inspect Memory under Task Manager, Performance during a busy session. On macOS, use Activity Monitor's Memory Pressure and Swap Used. Closing unused applications is the immediate fix; reducing startup tools can prevent recurrence.

For a permanent solution, check whether the exact laptop has replaceable memory. Many modern laptops, all current MacBooks and most Chromebooks use soldered RAM. If memory cannot be upgraded, replacement may be the only way to support a substantially heavier workload.

Step 16: check whether the laptop uses a hard drive

An older laptop with a mechanical hard disk can remain at 100 per cent disk activity during startup, updates and ordinary multitasking. Replacing it with a compatible SSD is often the single largest performance improvement available.

Task Manager's Performance section identifies the storage type on many Windows systems. The manufacturer's specifications or service manual can confirm drive format and upgrade options.

Back up before any replacement. A clicking, disappearing or error-producing drive should not be stressed by repeated benchmarks or cloning attempts if its files are important. Seek data-recovery advice first.

Step 17: check storage health

Warning signs include file errors, applications freezing while saving, very slow file access, disappearing drives, corrupted data and repeated operating-system repair messages.

Use the laptop or drive manufacturer's official diagnostics. Windows may also report drive health under Settings, System, Storage, Disks & volumes for supported NVMe devices. On a Mac, Disk Utility First Aid checks the file-system structure; Apple Diagnostics can help identify hardware faults.

A health status is not a guarantee. If symptoms suggest failure, prioritise copying irreplaceable data rather than repeatedly testing the drive.

Step 18: optimise the correct drive type

Windows normally optimises drives automatically. Search for Defragment and Optimize Drives to review the schedule. Windows defragments hard disks and uses TRIM-related optimisation for SSDs.

Do not repeatedly run old-style defragmentation utilities on an SSD. Do not use third-party “RAM cleaners” or registry cleaners; freeing cached memory can reduce performance, and registry cleaning rarely solves a genuine bottleneck.

macOS and ChromeOS manage supported internal solid-state storage automatically. Focus on free space, updates and the processes consuming resources.

Step 19: check the charger and battery

Some laptops reduce performance when the charger is missing, underpowered, damaged or not recognised. Use the correct manufacturer-approved or fully compatible USB-C power supply and cable with sufficient wattage.

Battery health can also affect behaviour. Windows manufacturer tools, macOS Battery Health and Chromebook Diagnostics may provide condition information. A swollen battery is a safety fault, not a performance setting.

If the laptop reports “plugged in” but loses charge under load, the power adapter may be too weak or the battery, port or charging circuitry may need service.

Step 20: run hardware diagnostics

Major manufacturers provide built-in or downloadable diagnostics for memory, storage, battery and cooling fans. Use only the official tool for the exact model. Record error codes and component identifiers.

Apple Diagnostics can test a Mac for hardware issues. Disconnect non-essential accessories, place the computer on a hard, stable surface with good ventilation and follow Apple's instructions for Apple silicon or Intel models.

A passing quick test does not rule out intermittent heat or storage faults. If the slowdown is repeatable under a particular workload, provide that pattern to the technician.

When an upgrade will help

An upgrade is worthwhile when diagnostics identify a clear hardware bottleneck and the laptop supports replacement parts.

Replace an HDD with an SSD when the mechanical drive is the system bottleneck.
Increase RAM when memory pressure is consistently high and modules are replaceable.
Install a larger SSD when the system drive is permanently short of free space.
Service cooling when a blocked heatsink or failed fan causes thermal throttling.
Replace the battery or charger when official diagnostics identify a power problem.

Processor and graphics chips are normally soldered in laptops and cannot be upgraded economically. Confirm compatible parts, maximum capacities and warranty implications through the official service manual.

When replacement makes more sense

Replacement may be better when the laptop cannot run a supported operating system, has soldered low-capacity memory, uses non-upgradeable slow storage or needs several expensive repairs.

A computer that was inexpensive when new may have a weak processor that no cleanup can transform. If Task Manager shows ordinary tasks maxing out the CPU while memory and storage remain healthy, the workload may have outgrown the machine.

Compare repair and upgrade cost with a new laptop that includes at least 16GB of RAM and a 512GB SSD. Consider data transfer, software licences, warranty and environmental recycling rather than only the purchase price.

Reset Windows or reinstall macOS only near the end

A reset or clean installation can resolve deep software corruption, but it erases applications and may remove files depending on the option selected. It will not fix insufficient hardware, overheating, a failing drive or an underpowered charger.

Before proceeding:

Create and verify a separate backup.
Record application licences, passwords and account details.
Save browser bookmarks, email archives and local game saves.
Confirm device encryption or recovery keys.
Download required network or storage drivers where applicable.
Keep the charger connected and allow the process to finish.

Windows provides Reset this PC with options to keep personal files or remove everything. Read each screen carefully because applications and settings are still removed. A Mac can use macOS Recovery to repair the disk or reinstall macOS. A Chromebook Powerwash erases local user information and should follow extension and hardware checks, not precede them.

When to seek professional help

Arrange service when the laptop overheats severely, shuts down under light use, reports hardware errors, makes mechanical drive noises, has a swollen battery or remains slow after a clean supported installation.

Also seek help before opening a difficult or sealed laptop, working around a battery, recovering irreplaceable files or updating firmware after repeated failures. Use the manufacturer, an authorised service provider or a reputable Australian repairer.

Check warranty and Australian Consumer Law rights before paying for a repair. Do not let a third party erase the device until important data and encryption keys are addressed.

Information to give the technician

The exact laptop model and operating-system version.
When the slowdown began and whether it was sudden or gradual.
Whether it occurs on battery, charger or both.
Which applications or tasks trigger it.
Task Manager or Activity Monitor CPU, memory and disk observations.
Free storage capacity.
Any unusual heat, fan behaviour, noises or shutdowns.
Recent updates, applications, accessories or repairs.
Diagnostic error codes.
The steps already attempted.

Frequently asked questions

Why is my new laptop slow?

A new laptop may be completing Windows updates, cloud syncing, search indexing and application installation. Connect power and internet, install all updates, restart and let background work settle. If it remains slow, check for weak hardware, bloatware or a faulty configuration.

Why is my laptop slow but Task Manager looks normal?

The delay may involve internet access, one application, power mode, thermal throttling, a driver or short resource spikes missed between observations. Reproduce the exact symptom and monitor it while it happens.

Will deleting files make it faster?

It can when the system drive is nearly full. Deleting random documents will not improve a computer that already has plenty of free space. Use the operating system's storage view to identify the real categories consuming capacity.

Will more RAM fix a slow laptop?

Only when insufficient memory is the bottleneck. If memory pressure is low but the CPU or disk is saturated, more RAM may achieve little. Check upgradeability before buying modules.

Should I factory-reset a slow laptop?

Only after backups and less destructive diagnosis. A reset can fix software corruption but cannot repair overheating, failed storage, inadequate memory or an ageing processor.

How often should I restart?

Restart when updates request it, when troubleshooting or when the session develops unusual behaviour. There is no need to restart constantly, but relying only on sleep for weeks can leave stuck processes and pending updates active.

The practical order to follow

Back up important files and check for safety warnings.
Identify when and where the slowdown occurs.
Restart properly and allow background work to settle.
Disconnect non-essential accessories.
Use Task Manager or Activity Monitor during the slowdown.
Close excess tabs and remove problematic extensions.
Free storage and reduce startup applications.
Finish updates and run an official malware scan.
Check power mode, heat, memory and drive type.
Run manufacturer hardware diagnostics.
Upgrade only the confirmed bottleneck.
Reset or reinstall only after backups and safer checks fail.
Arrange professional service for hardware or safety faults.

Official support resources

Information checked: August 2026. Menu names and recovery options can change with operating-system updates. Follow the official instructions for the installed version and exact laptop model.

Editorial disclosure: No laptop manufacturer, software company or repairer paid to be included in this guide. This article provides general troubleshooting information and does not replace professional inspection where electrical, battery, heat or data-recovery risks exist.