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

Fix Nginx 502 Bad Gateway on Docker Ubuntu

How to Fix Taskbar Icons Not Loading on Startup

You boot your PC, but the taskbar icons—volume, network, battery, or pinned apps—don't show u...

Fix Chrome Hardware Acceleration Black Screen in Windows 11

If Chrome shows a black screen on Windows 11, especially after an update or when playing video, h...

Fix Cloudflare Origin Certificate Error After SSL Change

You changed your SSL/TLS setting in Cloudflare (for example, from Flexible to Full or Full Strict...

Windows Update Error 0x800f081f: Troubleshooting Steps

You're running Windows Update and it fails with error 0x800f081f. This usually means the upda...

Git Merge --allow-unrelated-histories: When and How to Use It

You run git merge and get an error: fatal: refusing to merge unrelated histories...