windows 7 - Homegroup sharing problems

1. I can see other people in my homegroup and their folders, but when I click on those folders, I cannot see the contents (no error message, just nothing happens).


2. The other people in the Homegroup can see me just fine, and my files


3. In addition, I am unable to access any network computers, even my own.

In addition, I cannot see the files that they have under the network tab, though they can all see each others stuff.

What could be the issue?

The homegroup has already be created and recreated numerous times.

Perhaps unrelated, but I am unable to turn off password protected sharing.

EDIT: The error that I get is the network provider name is invalid.

Answer

Verify that the Microsoft Client for Microsoft Networks is installed on your adapter.

If this client is not installed, you can install it using the following steps: Click Add. Click Client, and then click Add. Click Microsoft, click Client For Microsoft Networks, and then click OK. Click OK. When you are prompted to restart your computer, do so.