If your Windows 11 PC is running slow, taking too long to start, or responding slowly when you open apps, several issues can be involved — too many startup programs, limited storage space, outdated drivers, malware, or corrupted system files.
You can improve performance with several built-in Windows tools and settings. This guide covers the steps in order, starting with the simplest solutions.
Why Is Windows 11 Running Slow?
Common causes include too many applications launching during startup, limited free storage space, outdated graphics or device drivers, malware or unwanted software, too many background applications, corrupted Windows system files, or a recent update or software conflict. Before making major changes, restart your computer and check whether performance improves.
Here’s how to speed up Windows 11:
Disable unnecessary startup programs
Press Ctrl + Shift + Esc to open Task Manager, select Startup apps, review the applications listed, select one you don’t need at startup, and click Disable. Avoid disabling Windows system components or applications you need immediately after signing in.
Check your available storage space
Go to Settings → System → Storage and review the available space on your system drive. Remove temporary files you no longer need using Windows Storage settings or Disk Cleanup — never delete Windows system files manually. If your computer is running low on storage, our guide to Windows Update Error Code 0x80070070 also covers related problems.
Update your graphics and device drivers
Right-click the Start button, select Device Manager, expand Display adapters, right-click your graphics device, select Update driver, and choose “Search automatically for drivers.” You can also check the manufacturer’s website for newer drivers. Restart your computer and check whether Windows responds more quickly.
Scan for malware
Open Windows Security from the Start menu, select Virus & threat protection, choose Scan options, select Quick scan or Full scan, and let it finish. Follow Windows Security’s recommended removal steps if a threat is detected, then restart your computer.
Run System File Checker
Right-click the Start button, select Terminal (Admin), and run sfc /scannow. Wait for the scan to complete and don’t close the window while it’s running. If SFC reports it couldn’t repair some files, run DISM /Online /Cleanup-Image /RestoreHealth, then run sfc /scannow again and restart Windows.
Install Windows updates
Go to Settings → Windows Update → Check for updates, install what’s available, and restart your PC if prompted. If Windows Update itself is failing or getting stuck, see our guide to Windows 11 Update Stuck or Not Installing. Check whether performance has improved after updating.
Reduce unnecessary background activity
Open Task Manager (Ctrl + Shift + Esc) and review the Processes tab. Look for applications consistently using a large amount of CPU, memory, or disk resources, and close the ones you recognize and don’t currently need. Be careful — avoid stopping Windows system processes unless you know what they do.
What If Windows 11 Is Still Running Slow?
If performance remains slow after these steps, the problem may involve hardware limitations, a damaged Windows installation, or a specific application. Check Task Manager to see if CPU, memory, or disk usage remains unusually high, and disconnect unnecessary external devices to test Windows again. Windows provides a reset feature under Settings → System → Recovery as a final option — back up important documents, photos, and other personal files first. A reset shouldn’t be the first solution — try the simpler methods above before using it. Our experts are here to assist you — Chat with a specialist — for more technical support.
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FAQ
Why is Windows 11 suddenly running slow?
A sudden performance drop can result from a new application, background process, malware, insufficient storage, a driver problem, a Windows update, or corrupted system files.
How can I speed up Windows 11 quickly?
Start by restarting the PC, disabling unnecessary startup applications, freeing up storage space, and checking Task Manager for applications using excessive resources.
Can outdated drivers make Windows 11 slow?
Yes. Outdated or incompatible drivers can cause performance and stability problems — updating important device drivers can help resolve these issues.
Should I reset Windows 11 if it’s slow?
A reset can help when other troubleshooting methods fail, but it should generally be treated as a later option — always back up important files first.
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