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

Chrome Sync Not Working on School Chromebook: Fixes

If your Chrome browser isn't syncing bookmarks, passwords, or history on a school Chromebook,...

Fix ERR_NAME_NOT_RESOLVED on All Sites in Chrome

If Chrome shows ERR_NAME_NOT_RESOLVED on every site you visit, it means your bro...

Fix Chrome Black Screen on Mac: Hardware Acceleration Issue

You open Chrome on your Mac, and the screen goes black—or parts of the page are garbled. This oft...

Fix Node Sass Build Failure After npm Cache Clean

Fixing Nginx Upstream Connection Refused on Port 443

You see "upstream connection refused" in your Nginx error log when proxying requests to p...

Cloudflare DNS Not Updating After Change: Fixes That Work

You change a DNS record in Cloudflare, wait, and the old IP still resolves. This is a common frus...