I don't think enterprise has anything to do with it. Windows 7 like Vista before it is a very Memory hungry OS. The more memory you have the more it uses. You can reduce this footprinte by disabling all of the services that you don't plan on using. I think someone said somewhere you can get it down to about 750MB of memory usage if you really hack and slash your services. I cannot complain though as I have Win 7 Home Prem 64-bit and I haven't had any problems aside from an old USB scanner from 1998 or so. Even then I can attempt to install the xp drivers and go from there. Also the claims that the OS is slow or sluggish, that is easily remedied. All you have to do is disable some of the visual effects, such as window fade in and out and suddenly it will seem that much faster. Performance wise, it seems to run on par with my WinXP partition (although that needs to be reformatted and reinstalled in it's defense.) All in all, after the Vista fiasco Win7 is like a dream to use and work on. Oh, and from what I remember the version numbers you are all quoting and asking as to why it's called Windows 7 with a version number of 6.1 or whatnot. That version number from what I remember reading is based off of the revision of the NT Kernel. XP (and Win2000 as well) was based off of the NT5 kernel and Vista was NT Kernel version 6. Windows 7 is not a new revision of the kernel. It is an upgrade to the kernel in Windows 7 and Server 2008 or whatnot. Not much else to it. I will look and see if I can find those articles that talked about the OS Version and I will post links when I find them.