i put some RAM in my motherboard and now computer keeps freezing now and again. Do you know what is wrong with my computer?
This support forum is intended to support users who are experiencing difficulty with WGA Validations/Notifications on Windows Vista. Your issue does not appear to fall into that category so it is off topic.
May I suggest checking your RAM with the diagnostic program at the following page: http://oca.microsoft.com/en/windiag.asp?
You will be more likely to get help with your problem at online hardware forums such as www.tomshardware.com, or at a reputable neighborhood computer repair shop.