Restore PC to original condition with the Recovery Manager if Windows Vista cannot be accessed
If the PC cannot access Windows, use Recovery Manager to restore the hard drive by following the steps below.
Press F11 on the keyboard immediately while the computer is starting up. The HP Backup and Recovery Manager window will appear.
If the Recovery Manager can access the hard drive it displays a prompt to backup up your user files before continuing the recovery. If it cannot access the hard drive to fix the system errors, the Recovery Manager starts recovering the hard drive to its original condition.