How to upgrade your Windows XP-running PC

Microsoft retires its 12-year-old Windows XP operating system on Tuesday. Even so, there are still millions of XP computers out there. Here's what to do if you own one of them:

What happens Tuesday?

- Microsoft Corp. will issue its final update to fix known security flaws with XP.

- After that, XP machines will still work, and you can install past security updates. You won't get new ones to address any new security flaws.

- Your machine will face greater security risks. Because hackers know Microsoft will no longer issue updates, they have extra incentive to look for security flaws.

Can I upgrade my computer?

- Check here to see whether your computer is running Windows XP: http://amirunningxp.com

- If it is, run the tool here to see whether your computer is powerful enough to upgrade:http://bit.ly/KkZERx

- If you can upgrade, you can buy a DVD version of the latest Windows 8 version for $120:http://bit.ly/1mQBzCe

- You'll need to back up your files and have discs for old programs handy, as an upgrade requires wiping out your hard drive. Microsoft has a step-by-step tutorial: http://bit.ly/1mYSYEj

- Keep in mind that it's likely better to use that $120 toward a new computer. You'll be getting something more powerful.

What if I keep using my XP computer, despite the risks?

- Be sure to run all the previously released updates, plus the last one out on Tuesday.

- If you don't need the Internet connection, unplug it. That will minimize the risk. Be careful about attaching USB storage drives, as that might introduce malicious software.

- If you need the Internet, refrain from using email, Facebook and other communications channels through which malicious software might travel.

- It's also a good idea to lock down your computer by using a profile that lacks administrative rights and to remove older software you no longer need.

Where can I get more information?

- What end of support means: http://windows.microsoft.com/en-us/windows/end-support-help - Upgrade information: http://windows.microsoft.com/en-us/windows-8/upgrade-to-windows-8