ccsvchst.exe

I have 2 of them that run and several times a day one of them iss doing something that uses a lot of memory. Normally sits around 10,000k but suring these times it jump to around 160,000k and drops back down and then goes up again like it's processing something. WHile it's doing that it slows my system down to a crawl. Any idea what might be causeing this issue????