I work in technical support for an ISP. One of the things I must know, natch, is what OS they're using. In cases where it's XP, I will inform (or, as the case is sometimes, remind) them that Microsoft will be ending all support for their OS of choice, and that now is the time to upgrade. My one regret is that these users have waited so long, resulting in that they must now upgrade to Windows 8.1.
Well, OK, they can probably get a copy of Win 7 from Newegg or somesuch.