Hi, when I received my Samsung 840 PRO 256gb.. I decided to reinstall w8. I unplugged all my other HDD's and installed windows 8, with it setup like this is booted in roughly 10 seconds. I rebooted 2-3 times with it being like this, I am also taking into account the spinning of the little circles with the windows icon, which took roughly 5 seconds. For the post screen I saw no difference in speed. Now A few reboots later I plugged in my 3 HDD's and rebooted the boot now takes 30-35 seconds, way longer.. I didn't notice a difference in the time it took to get past the post screen, but I did notice that the spinning cirlces took roughly 5-7 spins to load up to desktop, before, when I had just the ssd it took about 1.5 spins. Any idea why this is? The other drives are data drives, so i dont know what could be wrong.. Perhaps it's something with old OS files on the other HDD's. I never installed windows 8 on the other HDD's, but I remember installing Windows xp/vista/7 on some of the other ones, but I believe i formatted those drives, not sure if that messes anything up. Is there any programs that search for old OS's and let you uninstall system/os files. I know there is not an OS installed on any of the other HDD's, but I think there are some OS files. Such as system, documents and settings, that I cannot get rid of.