The easiest way is to switch off the automatic reboot option which forces the blue screen to stay visible.

1. Click Start
2. Right click on the Computer entry, this will show the System Properties screen
3. Click Advanced System Settings
4. The advanced tab will already be selected so click on Settings under the Startup and Recover section
5. Uncheck the Automatically Restart option

Next time you get a BSOD you will be able to read the error message, you will of course need to reboot the PC manually.