Really urgent help please. On my wife's new lap-top I installed a windows update. One of two. One failed,one installed. I clicked restart now and the computer started to shut down. The screen then showed"preparing to configure windows. Do not turn off your computer". After two hours I assumed there was something wrong so I tried to turn off but it wouldn't,even if I unplugged it,so I removed the battery. Now when I switch on and try to boot-up I see the same message and cannot get any further.
I would be grateful for some help please. Please also bear in mind that I am relatively new to computing also.