Knowledge base for software setup, errors, and daily tool work.

How to Fix a systemd Service Restart Loop

You start a systemd service and it immediately restarts, or it runs for a few seconds and then re...

How to Fix BitLocker Authentication Failed on Windows 11

You enter your BitLocker PIN or startup key, and Windows 11 shows 'Authentication failed.' This u...

How to Repair an Outlook Data File (.pst/.ost)

If Outlook suddenly won't open, shows error messages about a data file, or you can't see certain ...

How to Fix Network Errors in Command Prompt on Windows 10

Command Prompt Service Unavailable: Troubleshooting Checklist

When you open Command Prompt and see 'Service unavailable' or 'The requested service is not avail...

Fix Windows Defender SSL Certificate Errors After Update

After a Windows update, you might see SSL certificate errors in Windows Defender or other applica...