Windows 10: Update 1803 destroyed OS and files. Need to do factory restore.

My computer is an old Gateway DX4860. It came with Windows 8.1 pre installed to partition 2 and backed up on part. 1 as a factory restore. This OS came with a free upgrade to Win 10, which I did as soon as I got it.
The latest MS update destroyed my OS on Part 2, including data and software, systemprofile (no desktop). It looks like the update reset my system clock a month ahead. That played havoc as files were trying to be rebuilt.
My system restore is gone. No control panel, no desktop, SFC is "unable to repair," neither RECOVERY nor Rollback work. And I do not have an image.

Resetting the BIOS to legacy and bypassing the Microsoft Boot Manger to boot directly from the HD I got it to boot to the Task viewer and from there browse the HD. Most of my file folders are there but the contents are empty. I did use wusa command to remove the update but that did not help.

With restore, recovery, and rollback not working, I assume, all I can do is activate partion 1 for a factory restore?

That, though, is the original Win 8.1. How will I get back to the free upgrade to Win 10? What do I need to do? (Lesson learned here is to always have a backup Image. Don't rely on restore, recovery, or rollback.*cry )

:)

 

1803 Update - Unable to Uninstall 1803 Update

1803 Update does not show up on the list of updates in the "View update history window". All restore points were deleted with the 1803 Update

 

Does Windows 10 destroy the OEM restore partition?

After 30 days with Windows 10, can I simply do a factory restore on my ASUS PC and revert back to the original 8.0 Windows OS my PC had from the factory? Or does the install of Windows 10 destroy the restore partition and ability to go back to a first
boot condition?

I upgraded to 10 on my OEM hard drive, so I could activate Windows 10. My intention was to then get a new HDD and do a clean install of 10. (I heard you cant do a clean install until you activate/ upgrade your old OS.)

I need to resolve a video driver error with windows 10, so it's keeping me from installing office 365 and a slew of other programs. So, I'd like to go back to windows 8.1, clone that and do a dual boot system on a new hard drive, so I can work with both.
(the goal to eventually stay with 10 once it's running properly)

So, will doing a factory restore work or am I out of luck? Other options?

Thanks.