This explains it
http://www.howtogeek.com/howto.....t-running/

but see sometimes there are viruses that disguise them selves as these and then they are really hard to figure out since you think that they are part of windows

@windburst29, I hope you were only joking about stopping the svchost processes. Don't - that can be very unhealthy.

There is one virus that tries to hide itself as a fake svchost.exe process, but any of the anti-spyware applications should be able to remove it.

So if you've run a scan for spyware, then most likely the process is a valid part of windows. The article linked above by Lighthouse will help understand what the valid processes are doing.