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

Fix Windows 10 Cannot Access Shared Folder Error

You try to open a shared folder from another computer on your network, but Windows 10 shows an er...

How to Fix Cloudflare SSL Full Strict Self-Signed Certificate Error

Fix DNS Probe Finished NXDOMAIN in Edge Browser

When Microsoft Edge shows "DNS_PROBE_FINISHED_NXDOMAIN", it means the browser cannot reso...

How to Fix Git Detached HEAD State and Undo Changes

You run git status and see something like "HEAD detached at abc123". This ha...

Fixing Windows Update Error 0x80070005 and SFC Scan Issues

You try to run Windows Update but get error 0x80070005. When you run System File Checker (SFC /sc...

Fixing Nginx Upstream Connection Refused in Load Balancing

When Nginx load balancing returns upstream connection refused, it means one or more ...