Hm... So far I using Windows 7 Ultimate, there is no any problem and you will found that it is convenient to use when you know how use it. The video bellow is I capture. You can see the features in Win7. It included intergrated performance checking... Means we no need naymore 3rd party software like Everest. It provide BitLocker too(vista also got) for encrypt your drives and removable drives like USB Drives. It has a fun thing is the Aero Shaking... When you shake the windows by hte aero bar selected, it will auto minimise the rest of the windows. It eazy you when you need to direct copy file from desktop to the selected windows or maybe you wish to see the gadgets from your desktop...