After trying to backup my hard disk data files and failing I tried various options including the Win7 system repair disk unsuccessfully and then the three ACER system recovery disks with no success . Ended with SETUP IS STARTING SERVICES for 20 seconds or so and then WINDOWS CANNOT RESTART, TO CONTINUE INSTALLING WINDOWS RESTART THE COMPUTER. So when I restart the procedure repeats and I cannot escape the sequence . Can anyone please advise on how to break free of this conundrum other than a hammer !!!!