Had a call from my sister saying her PC won't boot. I popped in to have a quick look and it sails through POST and then attempts to start Windows and states the PC failed to start correctly and gives me the following options:
Safe Mode Safe Mode with Command Prompt Safe Mode with Networking Last known Good Configuration (or something to that effect) Start Windows Normally
All of the above seem to start and then the PC reboots.
The fact the PC get's to this point seems to indicate the hardware is ok and from what she has told me she hasn't knowingly installed anything in the last few days and it was all working fine as she was using it yesterday. The PC is installed with AdAware, Spybot, Microsoft Defender and Avast and she updates and runs these on a regular basis. She's running XP SP2.