A 408 means the server waited for your request and gave up. What a visitor can do, and the four server side settings that cause it.

Microsoft 53003 means a sign-in policy blocked you, not a wrong password. What it really means, what you can try, and what only an admin can change.

Windows says this when the phone book of the internet does not answer. Seven fixes in order, and the one test that shows whether it is the DNS at all.

Some sites open and others hang. How to tell in a minute whether it is your browser, your computer, your router or your provider, and fix it.

WordPress cannot reach its database. The six causes in order, how to find which one you have, and what to do when the host says everything is fine.

DPI is dots per inch, and for anything on a screen it changes nothing. What it really means for printing, for images and for a mouse.

A 526 means Cloudflare reached your server and refused its certificate. The four reasons a certificate fails that check, and how to fix each one.

Blocking one address is only part of it. How to block a sender in Yahoo Mail, on the app, with filters, and what blocking cannot do.

A 520 means your server gave Cloudflare an answer it could not make sense of. The six real causes, and how to find yours without guessing.

A 410 says a page is gone on purpose and is never coming back. What it means for a visitor, and when a site owner should choose it over a 404.