I think you are overestimating how likely someone is to make note of such a thing when they have no reason to expect a ruse in the first place. This thing isn

I think you are overestimating how likely someone is to make note of such a thing when they have no reason to expect a ruse in the first place. This thing isn't meant to stand up to close scrutiny, but rather just quick glances of a screen as you walk by. I'm intimately familiar with the differences between Win7, MacOS and Windows XP UIs, but I'm also fairly sure if I saw that running on someone's desktop, even a Mac or Win7 box, I'd just think "Excel" and not really mentally nitpick based on the verisons of various other things running. Unless I had some other reason to believe something was amiss in the first place, I wouldn't give it enough thought to note the discrepancies and I doubt there are many people out there who would. For those of you that are convinced you'd still know something is up -- there are also all sorts of reasons why XP Excel running on other systems would be totally legitimate -- could be running in a virtualbox window, could be running in a remote desktop window, etc.