I'v been trying to install/upgrade windows 7 to windows 8.1. Every time I try whether it be upgrade from Win7 or clean install I keep getting a BSOD error "IRQL_NOT_LESS_OR_EQUAL" I only have a product key and downloaded the install from microsoft.com. In the BSOD it says look it up on the internet for more info. but i cant find anything like my situation. Please help!