ads running in background

I've visited several sites now and see that this is not an uncommon problem. I have a littany of ads running concurrently in the background on my computer. I've noticed that if I stop the svchost.exe that it will stop for a while but then it immediately returns. Please help.

Jim

via Bleeping Computer Last 20 Posts http://www.bleepingcomputer.com/forums/t/513119/ads-running-in-background/