Unistall the option in control panel under networks. Sounds like keylogger malware.
Win7 when configured on peer-to-peer Network has three types of Sharing configurations.
HomeGroup = Works only between Win 7 computers. This type of configuration makes it very easy to Entry Level Users to start Network sharing.
Home Network or Work Network = Basically similar(and better) to the previous methods of Work Group sharing that let you control what, how, and to whom folders would be shared with.
Public Sharing = Public Network (like Internet cafe) to reduce security risks.
If your network is comprised of Win 7 only and you want a simple Network, use this.
http://windows.microsoft.com/en-us/w...with-homegroup
After configuring the Homegroup scroll down to the Permission/Security section.
