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

How to Fix Firefox Secure Connection Failed SSL Errors

When Firefox shows a "Secure Connection Failed" error with an SSL-related message, it mea...

Fix Windows 11 WiFi Connected but No Internet After Sleep

You wake your Windows 11 PC from sleep, the WiFi icon shows connected, but you can't load any...

Fix Chrome Certificate Error: Invalid Authority SSL Certificate

If Chrome shows 'Your connection is not private' with 'NET::ERR_CERT_AUTHORITY_INVALI...

Fix Windows Update Service Not Running for System Restore

You might see “System Restore did not complete successfully” or “Windows Update service is not ru...

Fix Nginx Upstream Connection Refused in Proxy Pass