I purchased a windows 8 key during the upgrade offer period. I installed windows 8 no problem and recently 8.1, for whatever reason 8.1 caused my laptop to overheat and crash. I formatted and now all is well, however I cannot upgrade to windows 8.0/8.1.
Apparently my key is not valid, in fact none of the 4 I purchased are.
Does anyone know of a work-around?