http://blogs.zdnet.com/BTL/?p=1504Although usage of Windows XP in businesses improved to 38 percent of business PCs in the 2005Q1, a recent study shows that nearly four years after that operating system originally shipped (October 2001), it still trails behind its predecessor Windows 2000, found in 48 percent of business PCs. While a 10 percent difference doesn't sound like much, the change only marked a 6.6 percent improvement over 2003Q4 and a majority of that change apparently came by way of upgrades from the really outdated versions of Windows such as Windows 95, Windows 98, and Windows NT 4. Windows NT 4 succeeded Windows NT 3.51, the first of the fully 32-bit versions of Windows to get any sort of serious traction. Licensing costs? Even more security-holey? Product activation? The sheer size of the OS? The fact that Steve Ballmer said XP is what 2000 should have been (so why isn't it free then, you corporate pig? Of course, Microsoft slammed Windows 95/98 when promoting Windows 2000, and any other company trashing its own earlier products would otherwise be shunned into non-existence, WTF is wrong with our country? Oh yeah, money before quality)?