Get an email "from" mailer-daemon? There's a good reason this mysterious sender keeps showing up.

Your password alone might not be enough to keep hackers out. Two-factor authentication adds a second layer of protection that stops intruders even when they know your password. I'll explain how it works, why you need it, and how to set it up without making your daily log-in a hassle.

Your computer keeps shutting down and is telling you "Over Temperature." The culprit might be hiding in plain sight: dust and pet hair. I'll show you how those innocent-looking dust bunnies can kill a computer, and what to do about it.

I'll show you how to put a one-click restart button right on your taskbar. The skills you'll pick up along the way are useful far beyond restarting.

Wonder whether an AI has written the articles you read online -- like this one? The answer at Ask Leo! is no, but AI does play a role. Here's a behind-the-scenes look at how AI helps me, where it falls short, and what a real human -- me -- still does.

Letting your browser remember passwords is convenient. With that convenience comes significant risk. Most folks are much better served by using a password vault.

Does splitting your hard drive into two partitions make your computer faster and backups easier? I'll share my opinion on what partitioning really does and doesn't do, and what works better.

A website you use keeps misbehaving. Clearing cookies might fix it, but you don't want to lose your sign-ins everywhere else. Good news: your browser lets you clear cookies for just one site. I'll show you how.

Your email address changed, but the website where you have an account won't let you update it. Now what?

You've got a password manager and you've done everything right. Then you encounter some website that won't let you paste your password. It's maddening. And here's the kicker: whoever designed it that way actually made the site *less* secure.