There is an unfixed BIOS issue on the TH7-II RAID (at least with the
last available BIOS) that shows up with XP SP2 resulting in the MB
failing to auto shut down on exiting the OS. It auto shuts down fine
with XP SP1. However, the machine can still be readily shut down via
the case front-panel switch. The first problem you describe may be
just a faulty FP switch or a faulty connection from the front-panel
switch to the motherboard. The rest of the described problems might
result from either the BIOS problem that I described, or a corrupted
OS installation ( or both).