Hi. I Have a triple-boot in my computer. Windows vista, seven and windows 8. First time I installed windows 8, I had a lot of problems. When shutdown windows 8 ( Not restart ) the next time I used vista or seven, computer had to scan all my drivers with CHkDSK. I was looking for on forums like this, And I found the new "FAST STARTUP" in windows 8, since I Deactivated it everything OK. Now I just installed in the same way Windows 8.1, Deactivated "FAST STARTUP" at first, but every time I run seven or vista, I had to wait for CHKDSK, ( no matter if I shutdown or restart, windows 8 Fast StartUp only works in shutdown) So sorry for my horrible English.