One of the longest—five years!—and priciest
development projects at Microsoft, the Vista OS has yet to penetrate enterprise computing in any major way. The corporate version shipped in late 2006, and
2007 was supposed to be Vista's march into the enterprise. But many IT leaders have called it a costly resource hog that makes them love Windows XP. Even Vista's much-touted security isn't helping. Now, some companies who've been waiting for the first service pack before deploying
may skip Vista altogether due to lingering performance concerns.