Microsoft really wants everyone to stop using Windows XP. The software giant is pulling support for its 13-year old desktop operating system on April 8. So if you're still running the severely outdated OS it's time for an upgrade, and Microsoft wants to help out with $100 towards your new PC.

There are a few rules to follow if you want to take advantage of Microsoft's offer. First off, the deal only applies to select PCs worth more than $599, and you'll have to pick them up at a Microsoft Store. The promotion kicked off yesterday and runs through June 15, 2014 or until supplies run out. Microsoft highlights two of your options, HP's ENVY TouchSmart 15 touchscreen laptop and Lenovo's 2-in-1 ThinkPad S1 Yoga tablet-laptop hybrid, but the deal also covers other devices including certain Surface models.

If you're looking for a cheaper option there are plenty around, including low-end Windows 8 computers and even some old Windows 7 models that may feel a little more familiar if you're making the jump from Windows XP. Still, if you have an old PC lying around and think it might time for a new computer head to your nearest Microsoft store and see what's available.