Disable to the File Sharing

I am networking administrator and want to disable the file
sharing of user's PC which some user enable again by
file/printer sharing option in networking neighborhood and
it may be the great cause of virus. I want if they want to
share then it can be read only(which they by mistake share
it as full share) which is my problem. Therefore I want
that is their any other method that I can disable this
file sharing facility or make it only readonly access but
keeping the printshare not affected.