Hello Toroosncc,
Welcome to Microsoft Q&A forum.
May I know if you have had the chance to check the AI suggestion assistance yet? If you did, may I know if it helps you?
Since I'm not sure which files have you deleted, I'm unable to make sure how it can affect your system. In this case, let first try a system scan to see if it detects anything.
- Type "Command Prompt" in the search bar and select "Run as administrator"
- Type DISM/ Online/ Cleanup-image/ RestoreHealth.
- When the scan is done, type sfc/ scannow and press Enter.
- Restart the computer when the second scan is done.
After that, you can do these quick fixes as well.
- Resync the clock.
- Go to Settings > Time & language > Date and time.
- Make sure "Set time automatically" and "Set time zone automatically" are enabled.
- Select "Sync now" to resync the clock.
- Clear credentials cache. (Failure to validate credentials can also cause this, so we can just remove them and let the validation start from scratch.)
- Type "Credentials Manager" in the search bar and press Enter.
- Go to Windows Credentials.
- Remove all entries contains "Xbl" or your Microsoft Account.
- Restart your computer.
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