svchost.exe is a legit windows process. every instance of it is used for some application. you need to find which app is taking this svchost and using it. under the cpu column in task manager, click twice on cpu and see which svchost is using the most. kill it. then look at your startup (run/msgonfig) to see which process looks fishy. check the internet site (legit processes) for every entry that's in msconfig's start up.