Some consumers are having a hard time getting Windows Vista Service Pack 1 to install correctly.

"When I go to windows update on my laptop to download SP1 it doesn't find the update," groused one user on Microsoft's TechNet forum for Vista SP1.

Besides audio boards from SigmaTel, Realtek, Conexant and Creative Labs, a few other devices with unsupported device drivers are also affected, including two fingerprint scanners, a pair of graphics displays, a smart card controller, and a wireless card.

"I have just spent one to two hours figuring out that I have one of the problem [SigmaTel] drivers hence why windows update isn't offering me SP1. Neither is it offering me an updated new driver. In my book that is not a good customer experience and a bit of a waste of my time," complained one user, commenting on the Vista Team Blog.