I have a strange problem. My Windows 7 ultimate x64 is rebooting itself at the welcome/logon screen, in safe mode only. Normal mode is fine.
The reboot happens instantly, after a few seconds at the welcome screen, the screen goes black and the system is rebooted as though I had hit the "reboot" button on the case, with no clean shutdown taking place.
I am at a loss to know what could be starting in safe mode, that _doesn't_ start in normal mode, to cause this.
I have recently done a repair install of windows (the problem was there before that), I have tried replacing the safe mode parts of the registry with clean ones downloaded from an AV vendor website (mcafee if I remember correctly), and have tried doing sfc /scannow which resulted in a corrupted boot.sdi being replaced with the archived copy. None of these have fixed the problem.
Obviously, given that I have a usable normal mode, and good backups, this isn't the biggest problem ever, but it would be nice to get it fixed especially for the next time I need to fix a dodgy driver
install or similar.
Can anyone help suggest what I can check next, particularly in regards to understanding the startup process and what will be loading at the welcome screen that might be causing the reboot.