Changing an email address involves changing more than just the address. I'll look at common scenarios and a few additional approaches.

If someone has access to your email, they can use that as a starting point to hack your other accounts.

Use Process Explorer to identify windows or message boxes that appear without any obvious indicator of what program they're from.

Facebook is removing an account recovery feature, making this an important time to take stock of your own account security.

Email can bounce for many reasons. I'll look at several of the most common email bounce messages and try to interpret what they really mean.

If you forget your Wi-Fi password Windows may be able to remind you what it is.

Sharing posts you find on Facebook often results in an "unavailable" message. That's Facebook respecting privacy settings.

If you've lost your password, there may be recovery steps. If you've also lost your email address, recovery becomes significantly more difficult.

Hubs, switches, and routers are all computer networking devices with varying capabilities. Unfortunately, the terms are often misused.

Wi-Fi speed can be slow for many different reasons. Slow Wi-Fi can also be a symptom of speed constraints elsewhere.