You need to break out of the loop - here's how!
1. Press [Windows][Break] to open the System Properties dialog box.
2. On the Advanced tab, click the Settings button in the Startup And Recovery section.
3. In the System Failure section, deselect the Automatically Restart check box, and click OK.
4. To enable the changes, click OK in the System Properties dialog box.
This change configures the system to stop after encountering a system failure error, which allows you to investigate the problem error in more detail. You'll then have to manually restart the system.
Bare in mind that you'll have to work quickly to make the change before the system reboots. You may have better luck making the change if you launch the system in Safe Mode.