I use W2k works okay, if you use their IR device. The VR3 does not use the "IR standard" due to the need to work with the old VR3's out there. My dive buddy has a XP laptop and it downloads okay also. One very important bit of info: do not upload gases, it is a know bug to do a possible total reset your computer (and loose all tissue load info). It has happend to both me and my dive buddy (really pissed us off big time) Also mine has already failed before (which I have posted before) I have gotten it back with the latest software...so far no issues yet. My buddy and I are also on the beta software list (for the PC) and there has not been any beta updates at all since the last release. I am really dissappointed with OMS and Delta P with the slow response and lack of updates. OMS even still states future updates that are in "the works" and Delta P has already said to me that they are not working on that or it is not ready. Example is OMS stating audio alarm in the future, Delta P is not planning that. OMS is stating internet upgradeable....sure if you have the VERY latest software version (2.0 vrb)...if you do not have that software you have to send your computer back to Delta P.
I understand that I was buying a new computer and there would be a couple of issues, but the list just keeps going and going. One nice thing is OMS has said if my computer fails again they will give me a full refund.....but I have a hunch that will change if I ask for it....