...it's Windows 7.
The 64-bit edition.
Mmm... wow?
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(I suppose the real story here is that Microsoft really doesn't to sell XP any more, and -- while I'm not sure why this is -- every CPU capable of 64-bit operation seems to end up with the 64-bit version of Win 7 on it...)
Floating (network) licenses for various features packs as well. Amazing how much things have changed -- these days the raw data acquisition and display of a signal is only a very small part of the overall scope's value.