Continuously rooboot itself?

Hi.

When the laptop keeps rebooting shortly after Windows starts loading the reason is usually because the system files loaded by Windows at startup are corrupted.
Windows cannot complete booting and keeps restarting.
The fastest way to Fix the problem is by reinstalling Windows.
If Windows is installed on the same directory of the existing system performing an upgrade installation, the setup process will preserve all personal files, most installed software and settings.
Before reinstalling Windows you can try starting in safe mode (eg. on XP pressing f8 on startup). If the computer starts in safe mode, go to system restore and perform a restore to a date before the problem occurred. Unfortunately when the computer keeps re-booting ut will hardly start in safe mode. Often reinstalling Windows is the only option available.