Backing up data using an online backup service can be an important part of an overall strategy, but it's important to understand its limitations.

The Recycle Bin is your friend. I'll show you where it lives and how to control the space it uses.

Temp files can pile up. Why is that, and do you need to worry about them?

Downloading a file from the internet is easy, but controlling where downloads go takes a little more understanding.

When things behave unexpectedly, many people assume their computer has been compromised by remote hackers. Most of those people are wrong.

QR codes are a nifty way to encode web addresses and other text in a way that's easy for your smartphone to decode, but they are not without risk.

You have an email address and you want the associated phone number. It's unlikely you'll find it, but there are a few things to try.

It's hard to determine whether an email address is fake.

Spam is inevitable; just don't ask for more.

Freely accessible Wi-Fi is almost everywhere, and most systems are set up to use it safely. There are a few things to pay attention to in order to stay safe.