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

How to Clear SSH Known Hosts and Fix Host Key Verification Failed

Fix Nginx Config Test Fails with 'upstream host not found'

You run nginx -t and get upstream host not found. The config test fails...

Fix Windows Terminal Not Starting After Settings Reset

If you reset Windows Terminal settings and now the app won't start, you're likely stuck with a bl...

Fix Microsoft Store Blank Screen When Opening an App

You launch an app from the Microsoft Store, and instead of the app window, you get a blank screen...

How to Reset OneDrive Sync on Mac

If OneDrive on your Mac stops syncing properly—files stay stuck with a spinning icon, show error ...

Fix Git SSL Certificate Problems: Practical Steps

If you see errors like fatal: unable to access 'https://...': SSL certificate problem: unab...