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

Configure Windows Update to Trust a Custom SSL Certificate

If you manage Windows updates in an enterprise environment, you may need to use a custom SSL cert...

Fix PowerShell DNS Error 0x8007274d: Practical Steps

How to Fix Windows Defender Service Unavailable in Windows 10

If you see 'Windows Defender service unavailable' in Windows 10, the antivirus may be disabled or...

How to Fix Chrome Network Errors on Mac

If Chrome displays network errors like 'ERR_CONNECTION_REFUSED' or 'ERR_NETWORK_CHANGED' on your ...

Fix PuTTY Connection Refused After Server Restart

You restart your server, open PuTTY, and see "Connection refused". This is a com...

Fix VSCode Remote SSH Permission Denied on Windows

When using VSCode's Remote-SSH extension on Windows, you may see 'Permission denied (publickey)' ...