Windows 7 upgrade error? -

Every time i try to install windows 7 on my vista laptop it comes up with the error: Windows could not prepare the computer to boot into the next phase of the installation. to install windows, restart the installation. i have tried everything: -upgrade -clean install -clean install on a partition -Virus scans -Disk defag -trying to install in safe mode -turning off firewall, user account control +iv even re-downloaded the ISO file 3 times and still.. the same error +i am now sure that it is a problem with my laptop and not with the disk please help, THANKS (Y)

Don t update the setup at the start of the installation when it asks you to do that. Me too got the same problem but when I installed with the original setup it worked and now i m giving you this answer from 7.