1. Correct the hard drive configuration in BIOS
a. Boot into BIOS, then navigate to the hard drive options' operations mode
b. Verify that the controller configuration is correct. For example, if the OS is not on a RAID, it shouldn't be set to "RAID On"
c. Use the spacebar to correct the configuration, then reboot normally
2. If the machine is still failing to boot because of the classpnp.sys driver, run repairs on the system
a. Boot into Windows PE with command prompt. Run the following command:
sfc /scannow /offbootdir=c:\ /offwindir=c:\Windows
b. If it fails or does not run, then run
chkdsk /r c:
If it finds any problems, rerun it repeatedly until it no longer finds any
c. After chkdsk /r c: no longer finds problems, rerun:
sfc /scannow /offbootdir=c:\ /offwindir=c:\Windows
d. Reboot normally
