Hi Phonesis,
Thank you for posting your query in Microsoft Community.
From your issue description I understand that you are getting BSOD Driver Power State Failure error on Windows 8 computer.
In order to help you better please provide us the following information:
1) What was the recent change made to your computer prior to this issue?
2) What is the complete error message you get?
3) Are you using any third party security software?
4) What are you referring to when you mean hard drive disappeared?
5) Does the computer Boot to the desktop?
To fix the issue with BSOD Driver Power State Failure error you can follow these steps:
Method 1: Check Disk
Run Check Disk to fix the Errors which you are facing with hard drive on your computer.
Check disk is a command-line tool that checks volumes on your hard disk drive for problems. The tool then tries to repair any problems that it finds. For example, Chkdsk can repair problems related to bad sectors, lost clusters, cross-linked files, and directory
errors.
Steps to perform check disk:
a) Press” windows + R” key to open run window
b) In search filed type cmd and select ok, to open command prompt
.
c) Type chkdsk C: and hit enter to run Check Disk
d) Once the above command does the check disk, proceed further by typing this command chkdsk /f C: (This command finds and repair errors on drive C)
(When you use this command, Check Disk performs an analysis of the disk and then repairs any errors it finds, provided that the disk isn’t in use. If the disk is in use,
Check Disk displays a prompt that asks whether you want to schedule the disk to be checked the next time you restart the system. Click yes to schedule this check.)
The options for Check Disk are used as follows:
/F command + Name of the drive you want to check (e.g: /f c) Fixes errors on the disk
/V command + Name of the drive you want to check Displays the full path and name of every file on the disk (FAT16 and FAT32); displays cleanup messages if any (NTFS)
/R command + Name of the drive you want to check Locates bad sectors and recovers readable information
/X command + Name of the drive you want to check Forces the volume to dismount first if necessary (implies /F)
/I command + Name of the drive you want to check Performs a minimum check of index entries (NTFS only)
/C Skips checking of cycles within the folder structure (NTFS only)
/B command + Name of the drive
Important: While performing chkdsk on the hard drive if any bad sectors are found on the hard drive when chkdsk tries to repair that sector if any data available on that might be lost
If the computer boots to the desktop, perform system restore
Method 2: Perform a system restore
How to restore, refresh, or reset your PC
http://windows.microsoft.com/en-US/windows-8/restore-refresh-reset-pc
Note: The apps that came with your PC or you installed from Windows Store will
be reinstalled, but any apps you installed from other websites and DVDs will be removed. Windows puts a list of the removed apps on your desktop after refreshing your PC.
Method 3: Update the latest display/graphics, chipset drivers from the manufacturer’s website. If Windows 8 drivers are not available, you can install Windows 7 drivers in compatibility mode.
Follow these steps:
a) Press ‘Windows + W’ key on the keyboard.
b) Type compatibility in the search box and then press enter.
c) Click “Run programs made for previous versions of Windows” option from the list appeared in the left side.
d) Select the drivers and install.
You can also refer to this link:
Make older programs compatible with this version of Windows
http://windows.microsoft.com/en-IN/windows-8/older-programs-compatible-version-windows
For any Windows related assistance in the future, feel free to contact us and we will be glad to help.
