so i'm running win7 x64 i tried with VMware 12 (coz newer versions dont work on win7) i tried with newest vbox then i tried with 5.2 series of vbox then i tried with 4.3 series of vbox --- NONE of these allow me to "boot" to desktop, and by this i mean, the installation finishes and when you restart to do 1st boot/run/login on desk, all i get is infinite black screen of nothing just waiting with following: latest kubuntu latest kde plasma latest manjaro xfce latest mint cinamon - tried latest Zorin, and that one was only one that actually booted to desktop - the error is always: E_FAIL (0x80004005) searching on web resulted in nothing that fixes issue... my specs: CPU: QuadCore Athlon II X4 635 RAM: 8 GB DDR3 VGA: Leadtek GTX 550 Ti and i always had turned of hyper-v / amd-v (or whatever its called)...