thats a long time my pc takes around 40secs from startup to everything on the desktop being loaded, perhaps you should post back with your computer specs and a hyjackthis log.
Media Center Edition 2005
service pack 2
direct X 9.0c
1.72 celeron
Chaintech 9LIF
Intel- G i845GL
631 MB DDR
Bios Award 06/06/02
dual monitor
intel (64mb)
S3 trio 32/64 (2mb)
that should be it