Hi there,
With the next BSOD, write down exactly what the white printing states. The hexidecimal parameters are not so important as the initial stop code, and description. Sometimes it will list a driver that may be the cause.
Report back those findings for help.
If it occurring frequently, there is a appl program called "Who Crashed", you can download and run that can read the minidmp file logged on your computer, that sometimes will ID the culprit.