You have to disable the automatic restart to get the actual BSOD to be abled to read the error.
Press Winkey + Pause/Break, then go to the tab Advanced and press configure at the third button from the top.
There disable "Restart the computer automaticly"
Note: Actual names can be different don't have an english version.
EDIT: Added screenshots
Click to Enlarge
Click to Enlarge
Now next time your computer gets BSOD'd you can see the actual error code, write it down (or remember it) and post it here or google for it.