If you read the specs the 2012 is the only supported version for 7.4. That' a bit to soon in my opinion, see other post here.
I'd almost think HP should retina this new "strategy". But then again i don't work for HP. Did you also try a clean install?
I'd almost think HP should retina this new "strategy". But then again i don't work for HP. Did you also try a clean install?