|Have you any reason why you feel it is BIOS freezing up? It seems most unlikely but it might be just as Windows is starting.|
You could look in Device Manager, expand out Display adapters and see if there are any errors showing. If you right click the entry you can search for new drivers. Otherwise it is best get them from the computer manufacturer, using the make and model number.
Here's how to disable the restart:
I you see a blue screen let us know the exact error message and the first set of figures. If a file is mentioned let us know that too.
Always pop back and let us know the outcome - thanks