Is your Windows 11 PC taking longer than usual to start, opening apps slowly, freezing, or feeling sluggish during everyday tasks? Over time, too many startup programs, background apps, low storage space, outdated drivers, and other system issues can reduce your computer’s performance. In this guide, you’ll learn the most effective ways to improve Windows 11 performance, reduce lag, and make your computer run faster using built-in Windows tools and proven optimization techniques.
Fix 1: Restart Your PC
If your Windows 11 PC has become slow or unresponsive, start by restarting it. A restart clears temporary files stored in memory, closes background processes that may be consuming system resources, and resolves minor software glitches that can affect performance.
To restart your PC:
- Click the Start button.
- Select the Power icon.
- Click Restart.
After your computer restarts, wait a few minutes for Windows to finish loading background services before opening your apps again. If your PC feels faster, the slowdown was likely caused by temporary processes or apps that had been running for an extended period.
Fix 2: Disable Unnecessary Startup Apps
Many apps are configured to start automatically every time Windows 11 boots. While some are essential, others continue running in the background even if you don’t use them, consuming CPU, memory, and disk resources. Disabling unnecessary startup apps can reduce boot time and improve your PC’s overall responsiveness.
To disable startup apps:
- Press Ctrl + Shift + Esc to open Task Manager.
- Select the Startup apps tab.
- Review the applications and their impact on startups.
- Right-click any app you don’t need to launch automatically and select Disable.
Focus on disabling apps you rarely use, such as chat applications, music players, cloud storage clients, or game launchers. Leave essential software, including your antivirus, graphics drivers, and hardware utilities, enabled unless you’re certain they’re not required.
After making these changes, restart your PC and check whether Windows starts faster and feels more responsive.
Fix 3: Close Unnecessary Background Apps
Running too many applications at the same time can slow down your Windows 11 PC, especially if your computer has limited RAM or an older processor. Closing apps you aren’t using frees up system resources and can improve overall performance.
To identify resource-hungry apps:
- Press Ctrl + Shift + Esc to open Task Manager.
- On the Processes tab, click the CPU, Memory, or Disk column to sort apps by resource usage.
- Look for applications that use a large amount of system resources you don’t currently need.
- Select the app and click End task.
Common examples include:
- Web browsers with dozens of open tabs.
- Video streaming or music apps running in the background.
- File syncing applications that aren’t currently needed.
- Unused game launchers or messaging apps.
Note: Avoid ending Windows system processes or applications you don’t recognize, as doing so may cause system instability or data loss.
After closing unnecessary apps, use your PC for a few minutes and check whether programs open faster or the system feels more responsive. If Windows 11 is still running slowly, continue with the next solution.
Fix 4: Free Up Storage Space
A nearly full storage drive can significantly slow down your Windows 11 PC. As free space decreases, Windows has less room for temporary files, virtual memory, and system updates, which can lead to slower boot times, delayed app launches, and reduced overall performance.
For the best performance, try to keep at least 15–20% of your system drive free.
Remove Temporary Files
Windows automatically creates temporary files while installing updates, running apps, and browsing the web. Over time, these files can take up several gigabytes of storage.
To remove temporary files:
- Open Settings > System > Storage.
- Click Temporary files.
- Select the file types you want to remove, such as Temporary files, DirectX Shader Cache, Delivery Optimization Files, and Recycle Bin (if you no longer need the deleted files).
- Click Remove files.
Turn On Storage Sense
Storage Sense automatically deletes unnecessary files and helps keep your PC running efficiently without requiring manual cleanup.
- Open Settings > System > Storage.
- Turn on Storage Sense.
- Click Storage Sense to configure how often Windows automatically removes temporary files and empties the Recycle Bin.
Remove Unused Apps and Large Files
If your storage drive is still running low on space:
- Uninstall applications and games you no longer use.
- Delete or move large files, such as videos, downloads, and backups, to an external drive or cloud storage.
- If possible, install large games on a secondary drive to free up space on your Windows drive.
After freeing up storage space, restart your PC and check whether Windows boots faster, apps open more quickly, or the system feels more responsive. If your computer is still running slowly, continue with the next solution.
Fix 5: Adjust Visual Effects for Better Performance
Windows 11 uses animations, transparency effects, and visual enhancements to create a modern desktop experience. While these effects look good, they also consume system resources. Reducing unnecessary visual effects can make Windows feel more responsive, especially on older PCs or computers with limited RAM.
To optimize visual effects:
- Press Windows + S, type Adjust the appearance and performance of Windows, and open the matching result.
- In the Performance Options window, select Adjust for best performance to disable all visual effects.
Alternatively, choose Custom if you want to keep some visual features. For the best balance between performance and appearance, consider leaving these options enabled:
- Show thumbnails instead of icons
- Smooth edges of screen fonts
- Show window contents while dragging
Click Apply, then OK to save the changes.
If you prefer, you can also reduce transparency effects:
- Open Settings > Accessibility> visual effects.
- Turn Transparency effects off.
After applying these changes, use your PC for a few minutes to see if menus, File Explorer, and apps feel more responsive. If Windows 11 is still running slowly, continue with the next solution.
Fix 6: Install the Latest Windows Updates
Microsoft regularly releases Windows 11 updates that fix bugs, improve system stability, enhance security, and optimize performance. If your PC has become slow after skipping updates for a long time, installing the latest updates may resolve known issues and improve overall responsiveness.
To check for updates:
- Open Settings > Windows Update.
- Click Check for updates.
- Download and install any available updates.
- Restart your PC if prompted.
If optional updates are available, click Advanced options > Optional updates and review them carefully. These updates may include newer drivers or hardware compatibility improvements for your PC.
Tip: If your computer became slow immediately after installing a recent Windows update, wait a few days and check for another update. Microsoft often releases fixes for known issues through subsequent cumulative updates.
After installing the updates, use your PC for a while and check whether apps open faster or the system feels more responsive. If Windows 11 is still running slowly, continue with the next solution.
Fix 7: Update Device Drivers
Outdated or incompatible device drivers can slow down your Windows 11 PC, cause hardware issues, or reduce overall system stability. Keeping important drivers up to date helps your hardware communicate properly with Windows and ensures you receive the latest performance improvements and bug fixes.
Focus on updating these drivers first:
- Graphics driver
- Chipset driver
- Storage controller driver
- Network driver
To update a driver using Device Manager:
- Press Windows + X and select Device Manager.
- Expand the category for the device you want to update.
- Right-click the device and select Update driver.
- Click Search automatically for drivers and follow the on-screen instructions.
For the latest driver versions, visit your PC or motherboard manufacturer’s support website. If you have a dedicated graphics card, download the latest graphics driver directly from NVIDIA, AMD, or Intel.
Tip: If your PC became slow immediately after installing a new driver, you can roll back to the previous version. In Device Manager, right-click the device, select Properties > Driver, then click Roll Back Driver if the option is available.
After updating the drivers, restart your PC and use it normally for a few minutes. If Windows 11 still feels slow or unresponsive, continue with the next troubleshooting method.
Fix 8: Scan for Viruses and Malware
Malware, adware, and other unwanted software can consume CPU, memory, and disk resources in the background, causing your Windows 11 PC to become slow, unresponsive, or unstable. Running a full system scan can help detect and remove these threats.
To scan your PC using Windows Security:
- Open Settings and select Privacy & security.
- Click Windows Security, then select Virus & threat protection.
- Click Scan options.
- Select Full scan, then click Scan now.
- Wait for the scan to finish and follow the on-screen instructions if any threats are detected.
To help prevent future slowdowns:
- Keep Real-time protection enabled.
- Download software only from trusted sources.
- Avoid opening suspicious email attachments or links.
- Keep Windows 11 and your security definitions up to date.
After removing any detected threats, restart your PC and check whether Windows performs better. If your computer is still running slowly, continue with the next troubleshooting method.
Fix 9: Repair Corrupted System Files Using DISM and SFC
Corrupted or missing Windows system files can cause your PC to become slow, unstable, or unresponsive. If you’ve already tried the previous solutions and Windows 11 is still performing poorly, use the built-in DISM and System File Checker (SFC) tools to repair the operating system.
If you’re signed in to Windows:
- Press Windows + S, type cmd.
- Right-click Command Prompt and select Run as administrator.
First, run the following DISM command:
DISM /Online /Cleanup-Image /RestoreHealth
Wait for the process to reach 100%. Depending on your system, this may take several minutes.
Next, run the System File Checker:
sfc /scannow
SFC will scan your system files and automatically replace any corrupted or missing files it finds.
Once both scans are complete, restart your PC and check whether Windows is running more smoothly.
Tip: Run DISM before SFC. DISM repairs the Windows image that SFC uses to restore corrupted system files, increasing the chances of a successful repair.
Fix 10: Check Your Drive for Errors
If your Windows 11 PC is still running slowly, your storage drive may have file system errors or bad sectors that affect performance. Windows includes the Check Disk (CHKDSK) utility, which scans your drive for errors and repairs file system problems.
If you can sign in to Windows:
- Press Windows + S, type cmd.
- Right-click Command Prompt and select Run as administrator.
Run the following command:
chkdsk C: /f /r
Note: Replace C: with your Windows drive letter if Windows is installed on a different partition.
The command options mean:
- /f – Fixes file system errors.
- /r – Locates bad sectors and attempts to recover readable data.
If Windows reports that the drive is currently in use, type Y and press Enter to schedule the scan for the next restart.
Restart your computer and allow the scan to complete. Depending on the size and condition of your drive, this process may take some time.
After Windows starts again, check whether your PC feels more responsive. If performance is still poor, the slowdown may be caused by aging hardware rather than software issues.
Fix 11: Upgrade to a Solid State Drive (SSD)
If your Windows 11 PC still uses a traditional hard disk drive (HDD), upgrading to a Solid State Drive (SSD) is one of the most effective ways to improve overall performance. An SSD can dramatically reduce boot times, speed up app launches, and make Windows feel much more responsive.
You may benefit from an SSD upgrade if your PC:
- Takes several minutes to start.
- Opens apps or files very slowly.
- Frequently shows high disk usage in Task Manager.
- Still uses a mechanical hard drive instead of an SSD.
To check your drive type:
- Open Task Manager and select the Performance tab.
- Click your storage drive to see whether it’s listed as an SSD or HDD.
If your PC uses an HDD, replacing it with an SSD can significantly improve everyday performance without changing your processor or reinstalling all your software. If possible, install Windows 11 on the SSD and use your existing hard drive as secondary storage for documents, photos, and other large files.
Tip: Upgrading from an HDD to an SSD typically provides a much larger performance improvement than upgrading the processor alone, especially on older computers.
Fix 12: Add More RAM
If your Windows 11 PC still feels slow after trying all the software optimizations above, your computer may not have enough memory (RAM) to handle your daily workload. Upgrading the RAM allows Windows to keep more applications in memory, reducing slowdowns caused by frequent disk usage.
You may benefit from adding more RAM if:
- Your PC becomes slow when you open multiple applications or browser tabs.
- Task Manager frequently shows Memory usage above 80–90%.
- Apps take a long time to switch or respond.
- Windows displays low memory warnings or becomes unresponsive during multitasking.
To check your current RAM usage:
- Press Ctrl + Shift + Esc to open Task Manager.
- Select the Performance tab.
- Click Memory to view your installed RAM and current memory usage.
As a general guideline:
- 8 GB RAM – Suitable for web browsing, office work, and light multitasking.
- 16 GB RAM – Recommended for most Windows 11 users and everyday multitasking.
- 32 GB RAM or more – Ideal for content creation, virtual machines, and demanding professional workloads.
Tip: Before purchasing additional RAM, check your PC or motherboard manufacturer’s specifications to confirm the supported memory type, speed, and maximum capacity.
If your memory usage is consistently high during normal use, upgrading the RAM can significantly improve responsiveness and reduce slowdowns, especially when running multiple applications simultaneously.
Summary
A slow Windows 11 PC doesn’t always mean it’s time to replace your computer. In many cases, you can improve performance by restarting your PC, disabling unnecessary startup and background apps, freeing up storage space, installing the latest Windows updates, updating device drivers, and repairing system files.
If your computer is still slow after trying these solutions, it may be limited by older hardware. Upgrading to an SSD or adding more RAM can significantly improve boot times, application loading, and overall responsiveness. Work through each solution in the order presented, testing your PC after each step to identify what makes the biggest difference.
Frequently Asked Questions (FAQs)
Windows 11 can become slow due to too many startup programs, background apps, low storage space, outdated drivers, malware, corrupted system files, or aging hardware. Following the optimization steps in this guide can help identify and fix the most common causes.
Start by restarting your PC, disabling unnecessary startup apps, closing background programs, freeing up storage space, installing Windows updates, and updating important device drivers. These changes can noticeably improve performance on many computers.
Yes, if your PC frequently runs out of memory while multitasking. Adding more RAM helps Windows keep more applications in memory, reducing slowdowns caused by excessive disk usage.
Yes. Replacing a traditional hard drive (HDD) with a solid-state drive (SSD) is one of the most effective upgrades for improving Windows 11 performance. An SSD can significantly reduce boot times, speed up app launches, and improve overall system responsiveness.
Basic maintenance, such as installing Windows updates, removing temporary files, checking startup apps, and scanning for malware, should be performed regularly. Reviewing your PC every few months can help maintain good performance and prevent slowdowns over time.
