I recently bought a couple QVS UPSs. These have the serial cable and software and are supposed to shut down the PC when the power goes out. I'm using Win XP Pro. I started on my wifes first. Made sure the com ports were on in BIOS. Plugged in all cables and installed the software all ports were located and it looked good. So for a test I unplugged the UPS. It beeped but never shut down the computer. I went to the control panel, power options, UPS and tried settings there. Everything was recognized, so I pulled the plug on the UPS again and 90 seconds later it shut down the computer. Great. No not great. Now when I boot up and everything is installed no more hour glass on the desktop, the computer logs off and shuts down. Can't do anything. I tried safe mode and removed the software for the UPS. Still does the same. Logs itself off right away. In safe mode I tried control panel, power options, UPS and nothing can be done there. I tried going back to the last known good configuration and that is no help either. Can anybody help? My wife is going to be P.O.