I have a similar problem with the svchost process. When I connect to internet (using Dialup believe it or not!) one of the 6 svchost processes suddenly uses 99% of my CPU, and about 40-50.000 kb of memory. After 20-30 seconds this goes back to 0% CPU and 35.000 kb of memory. This is a little annoying, but most of all I wonder if it could be a virus. About a month ago I had a Svchost.exe virus (located in the c:\windows folder), but I got rid of it, and neither NOD32 nor Avast U3 Edition detects any virus.