svchost is an 'envelope' that contains several small programs or 'services'. Sometimes malicious software installs itself as a service and then runs from one of these envelopes. It is difficult to see what is running inside of these envelopes.
You could try a system restore to restore your settings back to the way they were before. More info on this can be found HERE
. This would cure a registry error.
You don't mention any other symptoms of an infection, but let's check anyway. I know you have run one scan and it came up clean, but no one program can catch everything. And a virus scan will not catch adware, spyware, etc.
I would recommend following the Preparation Guide to posting a High Jack This log. You may not need to actually post a log, however. If you follow the instuctions in the Prepatory Guide faithfully then this little bugger ought to be removed. However, rarely is a computer infected with only one thing.
If after completing all of the steps in the Preparation Guide you continue to have issues, post a HJT log as instructed in the Preparation Guide.
At least this will prove that the computer is clean and then we can look elsewhere for the cause. If there is more to the story, such as other symptoms etc, let us know. Document any error messages you get and post them here word for word.
Edited by Albert Frankenstein, 22 April 2006 - 12:22 PM.