Well, if you haven't actually done the upgrade then you haven't actually done the upgrade. I've heard of lots of complaints, the latest ones about the trickery of "red X meaning implicit consent" being legitimate, but nothing like yours. I honestly doubt that this has anything to do at all with Windows 10 but more likely the state of the systems prior to upgrade.
However, if you have a system running Windows 7 or Windows 8 and wish to perform an "exorcism" of Windows 10 upgrade components already present and to block them, then download and install GWX Control Panel and, if you wish, Never 10. The former will definitely wipe off any existing material, including the GWX invitation program if present, while the latter sets up some other barriers to installation but doesn't do a wipe and the two do not conflict with each other.
On your malfunctioning machines you had ought to open up a command prompt elevated to administrator status and run the following to identify various sorts of OS corruption and fix them:
SFC.exe /scannow (on any recent version of Windows)
DISM /Online /Cleanup-Image /RestoreHealth (on a Windows 10 Machine)
Using something like Malwarebytes after those two wouldn't be a bad idea, either.
P.S. All of the above can be done after having booted into Safe Mode, with networking if needed, if memory serves and I'd try booting into Safe Mode first, regardless of the version of Windows
Edited by britechguy, 09 June 2016 - 12:56 PM.