Guys, could you please help me with this if you can.

Vista won't go to sleep or hibernate properly.

For sleep it just turns the monitor off and that's it. For hibernate it will pretty much look like it's working then freak out when it's restarting, black screen and all the fans roaring at me.

All BIOS stuff turned on, all drivers up-to-date.

For some reason I think it might be to do with the awful ASUS software I had installed briefly. Specifically this 'ATK ACPI 0110K Utility' device in the device manager that won't go away, but I've no idea really.

Does anyone else have problems with sleep etc in Vista with this board? It's Vista x64 SP1.