Try running it using a deep scan in Safe mode and see if it still hangs.
On the Scan Page choose Scan Options > Full System Scan. Do this at
least two times until detects something. Also, before you restart in safe
mode, disable System Restore, some trojans and spyware programs are likely
to restore themselves with system snap shots:
Right click My Computer > Properties > System Restore, check the "Disable
System Restore" check box and restart in safe mode.
Restart in safe mode instructions:
www.microsoft.com/resources/documentation/
windows/xp/all/proddocs/en-us/boot_failsafe.mspx
Remember, this is still beta and cannot be judged as a finished shipping
product.
