i experienced this on this computer. I was really furious at the time, but it seems i didn't try to update for about 2 days. This seemed to work and finally update over time ><.
its really annoying and has nothing to do with vista
i would contact steam about this issue :amazed:
-intel® Core 2 Duo T7600 (2.33GHz, 4MB L2 Cache, 667 MHz FSB)
-2GB DDR2 SDRAM at 667MHZ, 2 DIMM
-512MB NVIDIA® GeForce Go 7950 GTX
-WD 80GB 7200rpm SATA Hard Drive
-8X CD/DVD Burner (DVD+/-RW) with double-layer DVD+R