Yes , Haswell , on my spare PC. Maybe this information will help someone , to make the bug less frequent , you need to disable Windows defender (or better remove it completely with vLite) and manually delay the boot process , yeah , add a ton of startup processes , for example . I've noticed it when booting from an old [slow] HDD makes it boot without the damn error. I don't know if that helps if you installed SP2 . My main PC is with LGA1156 and currently running SP1 , but I want to use RTM , the only thing that prevents me from doing so , that weird VRAM limit. I just don't see any useful things added in service packs , except for DX11 maybe , but yet again , I only have one game that can use it . I honestly don't understand why do I have to install updates too. They just make my PC slower. Vista RTM is the sweet spot between speed and modern windows. I had Windows Millenium before Vista , btw. Also good , despite the common bashing.