Recovering the system without using Windows
Disconnect all peripherals and internal non preinstalled devices from the PC, except the monitor, keyboard, and mouse.
Turn on the computer.
When the initial blue HP screen appears, press the F10 key repeatedly until a recovery menu appears. The progress indicator that first appears does not indicate that a recovery is taking place. The progress indicator represents the time before the recovery process is started.
When the Recovery screen appears, click Next, and then click Yes to perform a normal, non-destructive recovery.
To perform a destructive recovery, click Advanced, and then click Yes.
After the System Recovery is complete, and the computer starts successfully, update the computer software as follows: