"Workgroup is not accessible. You might not have permission to use this network resource. Contact your server administrator of this server to find out if you have access permission
No more connection can be made to this remote computer at this time because there are already as many connections as the computer can accept."

I am really upset about this problem I have to restart my server . Or wait some time then it might be accessible.
I have install Avg & symantec end protection.

The maximum number of connections that a Server or Computer in a Workgroup will support is 10. To get more than 10 connections at a time, you will need to change to a client/server environment such as Windows Small Business Server or Windows Server Standard Editions.