Hello everybody! I registered here for now to ask my question. I am started android development. but for using android SDK become faster I had to enable Intel virtual technology. so I get in BIOS setup and enabled it. when I restarted my laptop windows don't comes up (and don't fixed when disabled it too wtf!). I tried to fix with system restore and etc but no reaspone. I installed a new windows(8) and second part of problem started from here. now my onkey mouse dont work and when I click sleep on windows when I wakes it up started from LENOVO logo but with my opened programs and saved state ... . my specs: model: laptop lenovo ideapad z510 old os: windows 8.1 pro 64x new os: windows 8 pro 64x Cpu: intel core i7-4702MQ ram: 6gb what I tried: installed last drivers and writes in a forum .