A Windows 11 computer can feel slow for many reasons, including too many startup programs, low free storage, pending updates, browser overload, or one background app using too many resources. Start with simple checks and change one thing at a time so you can see what actually helps.
Step-by-step instructions
Save your work and restart the PC. A restart clears temporary processes and can complete pending maintenance tasks.
Open Settings and search for Startup apps. Disable only nonessential programs you recognize and do not need immediately after sign-in.
Open Settings > System > Storage. Review temporary files and large categories, but keep personal files and unfamiliar system items unless you know they are safe to remove.
Press Ctrl + Shift + Esc and sort Processes by CPU, Memory, or Disk. Look for one application that is consistently using an unusually large share of resources.
Install normal Windows updates and restart when requested.
Close unused tabs and remove extensions you no longer use. Browsers can use a large amount of memory when many tabs stay open.
Useful tips
- Avoid unknown registry cleaners and one-click optimizer tools.
- Keep some free space on the Windows drive.
- If the slowdown started after installing one app, test by closing or uninstalling that app.
Frequently asked questions
A large update, heavy background process, low storage, browser overload, or a recently installed program are common causes.
No. Disable only nonessential apps you recognize.
Usually not. Windows already includes useful storage, startup, update, and security tools.
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