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

Fix 'Port Already in Use' Error When No Process Shows

You try to launch Chrome or a Chrome-based tool (like Puppeteer, Selenium, or a local dev server)...

Fix Outlook Blank Screen After Office Installation

Symptom and likely cause

After installing or updating Microsoft Office, Outlook may open ...

UFW Allow Port Not Working After Reboot: Fixes That Actually Work

You added a UFW rule to allow a port, it works fine until you reboot, then the port is blocked ag...

How to Fix PowerShell DNS Errors in Windows

When PowerShell throws a DNS error—like "DNS name does not exist" or "Cannot resolve the server n...

How to Fix BitLocker Drive Slow on Startup

If your Windows PC takes unusually long to boot after enabling BitLocker drive encryption, you're...

Fix OneDrive Sync Error 0x8004de40 on Ubuntu

If you see error 0x8004de40 when syncing OneDrive on Ubuntu, the sync client usually fails to aut...