A Reset installation, whether or not you keep your user files, is described as a full replacement of the existing instance of Windows 10 by a fresh one. I have nothing more to go on than the way that Microsoft has characterized a Reset. I cannot say what it will or will not do in regard to what's on your recovery drive. I thought the initial upgrade process from earlier versions of Windows to Windows 10 supplanted what was on the recovery drive with the equivalent for Windows 10 if a recovery drive was set up, but I could be mistaken. A Reset installation requires no external media, but does require an internet connection, and the fresh latest copy of Windows 10 is downloaded directly from Microsoft. Once a system has had a legitimate version of Windows 10 installed and activated full reinstallations or resets can be done at will.
I would definitely try that first, but I must say I find it most peculiar that you can't run any of the usual disinfection tools. If you would prefer to avoid a Reset I would suggest you start a dedicated thread in the "Am I infected? What Should I Do?" forum. If there's really nothing to lose (as in you haven't spent weeks customizing, etc.) then I'd just do a Reset. If that doesn't resolve the issue then I'd create installation media for Window 10 using the Media Creation Tool that's appropriate for your system and do a completely fresh install, from scratch.
At this point there is absolutely no reason to take a system image of an infected system. I suggest that anyone considering an upgrade from an earlier version of Windows to Windows 10 take a full system image backup, and separate user data backup, of their system before ever initiating an upgrade. That way if the upgrade catastrophically fails they still have the mechanisms needed to recover their prior system. If you did not do this with your old Windows 8.1 system it is too late to do it now. Once you have a version of Windows 10 that is functioning to your liking and you've done at least your minimal set of personalizations I would take a full system image of that as well so you have a recovery baseline should you need it. On an ongoing basis you should take occasional system images whenever you've done enough work on your system (e.g., installing a number of apps and programs, tweaking a huge number of system settings, etc.) that "you'd cry and tear your hair out" were you forced to do them all again by hand.
Edited by britechguy, 29 December 2015 - 01:36 PM.
Brian AKA Bri the Tech Guy (website in my user profile) - Windows 10 Home, 64-Bit, Version 1809, Build 17763
Travel is fatal to prejudice, bigotry, and narrow-mindedness, and many of our people need it sorely on these accounts. Broad, wholesome, charitable views of men and things cannot be acquired by vegetating in one little corner of the earth all one's lifetime.
~ Mark Twain