Mathcad 13 on Windows 7 or Windows 8

I have an old version of Mathcad 13, and was wondering if anyone uses this on Windows 7 or 8 platforms. I have searched the internet, and found that some people have been able to do it, but never got a concrete answer. System requirements show that Windows XP is the minimum, but I didn't understand if it works on Windows 7 or 8.  I understand that this question may have been posted numerous times, but a little help is highly appreciated.