if you want to stop thing from loading up at start up use
HijackthisYes there are 4 S
vchost.exe, but if you see S
cvhost.exe this is a very noctorious virus/spyware
But for AH to run at 100% is very unusual, i have a AMD 3300+ and it usually never goes above 35% (althou this is with AH minimised)
as for USranger, i am clueless about your situation, i never thought that something like that could happen, and keep happening
last time i seen a dual core (laptop) using 50% constantly it crashed and burned