|Restart and hold down F8 - you may be asked which device to boot from, select the hard drive. When the Advanced Boot Options are displayed select "Disable automatic restart on system failure".|
The system may attempt to boot and display a Blue Screen Of Death. Post back with details of your computer, maker/model etc and the displayed Stop Code.
Edited: Reboot replaced with Restart....
Please come back & tell us if your problem is resolved.