New
#71
Not really sure. It might make a difference, but I don't see how, normally, the rule of thumb is to remove all overclocking when installing Windows. My mobo has a default minor OC I can (and have) enable in the BIOS, basically akin to the older Turbo modes, and I've got the mobo using the XMP profile settings for my RAM to match speeds, and I've never (OK, rarely) had a problem where installing forced me to remove the OC.
However, as with all things, YMMV.
Are you trying to boot from these .ISOs and upgrade that way? have you tried mounting the .ISO inside your working 16299 build / FCU build and running setup from inside Windows, too?