HP ProOne 400 G1 Maintenance & Service Manual page 166

NOTE:
This process takes several minutes.
1.
If possible, back up all personal files.
2.
Restart the computer, and then follow the instructions provided with the Windows 8 operating
system media to install the operating system.
3.
When prompted, press any keyboard key.
4.
Follow the on-screen instructions.
After the repair is completed:
1.
Remove the Windows 8 operating system media, and then insert the Driver Recovery media.
2.
Install the Hardware Enabling Drivers first, and then install Recommended Applications.
156 Chapter 10 Backup and Recovery