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  1. Tips to improve PC performance in Windows - Microsoft Support

    Your Windows device may run slowly for several reasons, such as limited storage space, too many startup apps running in the background, outdated software, or hardware that no longer …

  2. Startup Repair - Microsoft Support

    Oct 14, 2025 · Startup Repair is a Windows recovery tool that can fix certain system problems that might prevent Windows from starting. It scans your computer for the problem and then …

  3. Outlook is running slow - Microsoft Support

    If Outlook for Mac is running slowly, you might try moving messages out of the inbox or turn off logging. This article explains.

  4. Keep your device running smoothly with recommended …

    In current Windows 11 builds, we'll automatically fix certain critical problems on your Windows device to keep it running smoothly. We’ll also recommend troubleshooting for other problems …

  5. Defragment / optimize your data drives in Windows - Microsoft …

    If it's a hard disk drive, select Analyze if you want Windows to check the drive to see if it needs optimization, or select Optimize to have Windows run optimization on the drive.

  6. Fix issues by reinstalling the current version of Windows

    If your PC is experiencing problems, especially issues related to Windows Update, you can use the Fix problems using Windows Update recovery option to reinstall the current version of …

  7. Why is my Internet connection so slow? - Microsoft Support

    Learn how to recognize Internet connection problems and help improve your computer's online performance.

  8. Your computer is running slow and is affecting the audio quality

    Your computer is running slow and it is causing poor audio quality. You might have too many applications running at the same time on your computer. Try closing a few unnecessary …

  9. Use the System File Checker tool to repair missing or corrupted …

    Jan 12, 2007 · In the search results, right-click Command Prompt, and then select Run as administrator. If you are prompted for confirmation or an administrator password, type the …

  10. Classic Outlook not responding, stuck at "Processing," stopped …

    If Outlook stops responding at a screen that says "Processing," you can close Outlook, start it in safe mode, then close it and open it normally to fix the problem.