Is there any issue with the laptop or any applications on it, which is the reason why you are trying to reset your Windows 8 PC?
Receiving this message of ‘Unable to Reset Your PC. Required Driver Partition is Missing’ might look terrifying, but actually the problem behind this error message is quite simple. The reasons for it might include inactive or lost partitions, boot configuration issues, SSD or HDD corruption, etc.
You can make use of the CHKDSK to find out which partition is missing and rectify the issue right away and perform the reset efficiently. Please do revert back if you have any doubts regarding this process. I’d be happy to be of any help.