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

Fix Putty Connection Refused on Port 22

You try to connect to a remote server with Putty on port 22, but you get 'Connection refused'. Th...

Fix BitLocker Blank Screen After Sleep Mode on Windows

If you enable BitLocker drive encryption and your computer shows a blank screen after waking from...

Fix Firefox Secure Connection Failed Due to Antivirus Interference

You try to visit a website in Firefox and see a Secure Connection Failed error, ...

Fix OneDrive Sync Permission Denied & 504 Gateway Timeout

If you see "permission denied" or "504 gateway timeout" errors while syncing OneDrive, the issue ...

Fix Windows Defender Update Error 0x80070490 on Windows 11

If you see error 0x80070490 when trying to update Windows Defender on Windows 11, it usually mean...

Windows Update High CPU Usage Troubleshooting Checklist