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

DNS Probe Finished NXDOMAIN: Fix When ipconfig /flushdns Fails

You're browsing normally and suddenly Chrome shows "DNS_PROBE_FINISHED_NXDOMAIN". You...

Using nvm to Switch Node Version for a Specific Package

You might find that a package fails to install or run because it requires a specific Node.js vers...

Fix Windows Explorer Restarting After Login

If Windows Explorer keeps restarting after you log in, you’ll see the desktop flash, icons disapp...

Fix Windows Security App Not Responding: Step-by-Step

You open Windows Security to run a scan or check protection, but the app freezes, shows a blank w...

Setup Cloudflare Origin Certificate for Nginx

If you use Cloudflare as a reverse proxy, enabling HTTPS between Cloudflare and your Nginx server...

Fix Nginx Upstream Connection Refused Socket Error