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

Windows Defender 404 Not Found: How to Fix Missing Interface

You open Windows Security, click on Virus & threat protection, and get a blank page or a 404 erro...

Fix Windows Search Access Denied for Administrator Account

Why You See 'Access Denied' as Administrator

You're logged in as an administrator, but Wi...

Fix Microsoft Store Proxy Error: Cannot Connect

When you open Microsoft Store and see “Cannot connect” or a proxy error, it usually means the app...

Fix 'Port Already Allocated' with Security Permission Denied

You try to start a service or application, and you get an error like "port already allocated" or ...

Fix Chrome ERR_TUNNEL_CONNECTION_FAILED Error

When you see "ERR_TUNNEL_CONNECTION_FAILED" in Chrome, it usually means your browser can't establ...

Fix Windows Search Not Working After Update

After a Windows update, you might click the Start menu or press the Windows key and type, only to...