My windows 8 pc when booted, mostly freezes after i see my account picture with a circling dots. Then appears a black screen and just my cursors, but nothing else. I try to get task manager and run explorer.exe but it doesn't work. It has now been happening very much. I have installed the OS just a few days back and i got this issue. This also happens when i sign out/switch from my account to another account. Please, need help.