my mistake. it just never happens this way. alright. Windows reinstall is not the best idea here, nor cloning. Good advice.
 
I'm sorry I said that all your ideas in this area are total crap, actually it's just everything you said about cloning and driver issues... and also something about "client security trough fresh windows install" and... uhh...sorry again...

@svdinu Reinstall older build. Quick search finds this (Anniversary is good enough for almost all use cases): http://windowsiso.net/windows-10-iso/windows-10-anniversary-update-1607-download-build-14393-0/windows-10-anniversary-update-1607-iso-download-standard/
You can look for SHA1 hash values of the original MS ISOs and check if it's proper