hi. iv'e fixed many computers before but have never come across this, i was fixing my girlfriend's dad's laptop for him and it was fine. i just restored vista onto it using acer erecovery.
however, there has been another issue with it.
when i shut down the laptop now, it shuts down and then the monitor turns off as though it has succesfully shut down however the lights stay on on the laptop and i cannot turn it back on. the first time that i'm aware of this happening is when i was doing the erecovery but after several hours it came back on and erecovery suceeded.
it is an acer aspire 3050 running windows vista.