Windows Vista with 1gb RAM was painfully, painfully slow with this system. XP is quick, although it can still be a bit slow at times when opening up more than 2 web pages and having things like an AVG Anti-Virus Free running in the back ground. I can watch DVDs fine with no slow down, but 720 and 1020 stuff does not have acceptable frame rates.
The MSI Wind PC makes for the perfect MS Office, mp3 listening, IMing, and web surfing system.
The best, most succinct description of the stengths and weaknesses of an Atom-based system that I have seen to-date. The netbook/nettop concept does have merit.
I'd guess it would be a bit quicker with Ubuntu Linux (faster & no AV needed), significantly quicker yet with a lighter Linux, but still very weak with multimedia. (I do my web surfing on Ubuntu with a 900 MHz/512 MB AMD Duron with comparable/slightly better performance.)