Please zip up the contents of the C:\Windows\Minidump folder and upload/attach the .zip file with your next post.
A STOP 0x124 error is an error that's identified by your hardware - which then notifies Windows about it. In most cases it's a hardware failure or an incompatibility.
- check to ensure that your BIOS and drivers
are updated to the latest versions
- if you've been inside the case recently - go back in and reseat everything (I got a STOP 0x124 because of this yesterday).
- Run the Windows 7 upgrade advisor to see if it pinpoints any possible compatibilty errors (free from here: http://www.microsoft.com/downloads/d...displayLang=en
The memory dump file(s) will be used to see if there's any other issues, and to see what older drivers are loaded when the crash occurs.