I put Windows 7 on this computer brand new right out of the box-both the computer and the os. I have NEVER seen it lock up, have NEVER had to force a reboot, and have done, watched, listened to and played anything and everthing i have wanted on this machine. Zero problems! I do not care about fluff or features...I care about performance. MS got this one right...it will be hard to get me to move on.