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#11
update: I copied the Catroot and Catroot2 folders from my other PC onto the broken installation. With my great surprise Windows 10 booted up!! Thank you so much guys, it was so easy!!!
But - there is a catch! I am still experiencing the "an administrator has blocked you from running this app" when opening items such as Device Manager or Disk management. This was happening before the crash, I thought it was because of the messed folders and the digital signature for mmc.exe.
Attachment 221721
Most importantly, I do not have network connectivity. The network driver seems to be working fine, the adaptor is detected and the cable is detected. However, I have no network displayed under "Network and share centre" and the details of the connection is an empty page.
However, I can pick it up from here. I am slowly creating a system restore disk (my RAID is also verifying!), then I'll create a system restore point. Then I'll begin the investigation. I guess this is not BSOD anymore and it's best to continue elsewhere on this forum?
I guess I'll cover the usual virus&malware as I assumed from the beginning that the error above was me messing with catroot and catroot2 folders but maybe it's all a coincidence and the system was broken by a bad system restore.
In any case, let me say how much I love this forum and how much I thank you guys for your help!!