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

Nginx 502 Bad Gateway: A Practical Troubleshooting Guide

Seeing a 502 Bad Gateway from Nginx usually means the upstream server (like PHP-FPM, uWSGI, or a ...

Fix Windows Backup Error 0x80070001 After Update

After a Windows update, you might see backup error 0x80070001. This often means "Incorrect functi...

How to Fix Command Prompt Not Opening as Administrator

You right-click Command Prompt and select "Run as administrator," but nothing happens, or it open...

Fix Windows Security Error 0x80073b01: App Install Blocked

When you try to install a Windows app from the Microsoft Store, you might see error code 0x80073b...

Remote Desktop Black Screen After Connection: How to Fix

You connect to a remote PC via Remote Desktop Protocol (RDP), see the login screen, but after ent...

Fix 'Outlook Path Not Found' Error After Migration