Domain server created user's profile automatically

My Domain server has this problem 2 weeks ago. it worked fine before.

About every one day, the DC server will automatically create user's profile under "document and setting" in server. No roaming profile was set. when we have this problem, we cannot access the shared folder in server. Restart the server solve it temporary but about 10 hours later, same problem come again.

I searched the solutions for this problem, some one suggested uninstall symantec, so I stopped all symantec service in DC server, and seems the problem fixed.

we use symantec antivirus version 10.1.5.5002.

any one know how to fix it?

Any suggestion would be appreciated..

Thanks,
Ant