Troubleshoot slow Performance – Check Windows System Files

If Windows operating system files are corrupt, it can cause slow performance and other problems on your Dell. Microsoft Windows has built-in utilities that can help you scan the PC for corrupt operating system files and replace them from a cached version on your PC or through Windows Update.

Run System File Checker

1. Restart your PC.
2. Click Windows Start button and search for CMD or Command Prompt.
3. Right-click Command Prompt and select Run as administrator.
   Click Yes in the User Account Control window.
4. In Command Prompt, type sfc /scannow and press Enter key on the keyboard.
   This will take several minutes to complete.
5. Once the scan is complete, restart your PC.

System File Checker (SFC) will scan your PC for corrupt Microsoft Windows operating system files. Once the scan is complete, the results are displayed on the screen. If System File Checker (SFC) found corrupt files and replaced them, restart your PC. If System File Checker (SFC) did not find any corrupt files, try running the Deployment Image Servicing and Management (DISM) tool.

Run Deployment Image Servicing and Management (DISM) tool in Windows 10, Windows 8.1 or 8 only

DISM tool, checks for corrupt Microsoft Windows operating systems and then downloads and replaces them using Windows Update.

1. Restart your PC.
2. Click Windows Start button and search for CMD or Command Prompt.
3. Right-click Command Prompt and select Run as administrator.
   Click Yes in the User Account Control window.
4. In Command Prompt, type dism.exe /Online /Cleanup-image /Restorehealth and press Enter key on the keyboard.
   This will take several minutes to complete.
5. Once the scan is complete, restart your PC.