Windows 10: INACCESSIBLE BOOT DEVICE after deleting upper and lower filter of the wrong device

I have tried to fix my external CD drive to show up and stumbled upon this guide: https://www.youtube.com/watch?v=9GNeizyOsQg

I've tried multiple of his suggestions until finally the part to delete lower and upper filters in the registry for the device cd/dvd drive.

However I accidentally deleted them on the wrong device (Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4d36e967-e325-11ce-bfc1-08002be10318}) which is the hard drive device.


This resulted in the never ending blue screen INACCESSIBLE BOOT DEVICE. I have tried to let windows fix it, I've tried to restore to a previous point which failed with...
"system restore failed to extract the original copy of the directory from the restore point"

Source %Program Files%WindowsApps

Destination APPxStaging 0x80070026


...to which I have also found no working solution. Even renamed the WindowsApps folder since that was the only solution I found online.


Further I've tried re-adding the two deleted registry entries that I have deleted since I know exactly where I deleted them and what their values and types were since they are the same on any windows 10 device. So using my laptop I re-added those two LowerFilters, REG_MULTI_SZ "EhStorClass" and UpperFilters, REG_MULTI_SZ "partmgr" over the console offered in windows recovery mode.


I've also tried reverting the registry to it's "secret" backup in the "RegBack", but without success since it seemed to be empty and there was nothing to copy.


Now I'm sitting here having found nothing else to try and am currently preparing a windows to go usb drive to have a look at the registry in a GUI this time.


I would sincerely appreciate any feedback or useful things to try since I'm out of options and really don't want to reset windows and lose some of my files including having to reinstall and setup everything on my pc again.


Thanks in advance!

:)

 

Inaccessible boot device


I'm not sure if this is helpful, but maybe you can have a try. Windows operating system backups a working registry for recovery purpose. You can perform registry backup restoring to fix the inaccessible boot device error. The pre-condition is that you can access to the Advanced startup opotions of your PC. You'll need to use the command prompt.
Also, steps are a little bit complicated. However, if you follow the guide strictly, no mistake should be made. You can Google how to restore from Registry Backup, or refer to this article for help. Inaccessible Boot Device Lenovo.
Regards.

 

inaccessible boot device

Ciao,

here is a list of commone causes (and resolutions) of this BSOD:

http://www.thewindowsclub.com/inaccessible-boot...

Please let me know if any of those worked for you.

Ciao

Ugo

 

Inaccessible boot device

Unable to get past step 1 . Tried both safe mode and safe mode with networking. Goes back to inaccessible boot device.