I had a power failure on the circuit that handles these power outlets, the AC compressor pulled it down again. Managed to recover Valerie (MPC #1) after a erroneous WGA fail notice. The Dell OptiPlex lost something though, power button is yellow instead of green, no video...I suspect I lost the video card.
Will try switching the card.
I need to have a serious talk with my landlord and the electrician he hires. This is the last computer available at the moment.