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

Fix WinSCP Permission Denied Publickey Authentication

When connecting to a remote server with WinSCP using SSH public key authentication, you may see t...

How to Fix Windows Security Service Unavailable

When Windows Security shows "Service unavailable" or a red banner, your antivirus and firewall pr...

Fix Windows Defender Port Already Allocated in Event Viewer

If you see 'port already allocated' errors in Event Viewer related to Windows Defender, it usuall...

How to Restore Chrome Profile After a Crash

Symptoms of a Corrupted Chrome Profile

After a browser crash, you might see errors like '...

Fix Windows Defender Permission Denied Access Error

You try to open Windows Defender Security Center or run a scan, and you get a 'permission denied'...

How to Fix High Memory Usage by cmd.exe

If you notice that cmd.exe is using a lot of memory—sometimes hundreds of megabytes—it's usually ...