I just installed windows 7 ultimate 64 bit, and really like how it works so far.

It does have a action center notice that says my anti-virus isnt turned on. I am using Norton, and have the windows defender turned off. But I can live with this.

It was real nice to install, as it installed all the drivers during installation. So no need for motherboard, graphics cards, or any other device drivers....that was sweet!!

One thing I noticed right away is that a lot of the ways we would get into certain areas in windows is now different. So it has a learning curve for those that like to mess around with drivers, and the look and feel of their desk top. Nothing too bad though