I have an HP Compaq dc7900 Convertible Minitower that just reboots over and over again. I see the XP booting screen over and over again. If I turn it off with the power button, the "Windows was not turned off properly" appears. I have tried to boot into Safe Mode, Safe Mode with Networking and Safe Mode with Command Prompt, but it just loads the drivers and stalls. I have tried Last Known Good Configuration and Start Windows Normally and the rebooting cycle continues. Any ideas?