When you create or join a homegroup, you select the libraries you want to share with other people in the homegroup. Libraries are initially shared with Read access, which means that you can look at or listen to what's in the library, but you can't make changes to the files in it. You can adjust the level of access later, and you can exclude specific files and folders from sharing.
Open HomeGroup by clicking the Start button , clicking Control Panel, typing homegroup in the search box, and then clicking HomeGroup.
Do one of the following:
To create a new homegroup, click Create a homegroup.
To join an existing homegroup, click Join now.
On the next screen of the wizard, clear the check box for each library you don't want shared.
Click Next, and then click Finish.
Clear the check box for each library you don't want shared, and then click Save changes.
Navigate to the file or folder you want to exclude from sharing, and then select it.
To prevent the file or folder from being shared with anyone, in the toolbar, click Share with, and then click Nobody.
To share the file or folder with some people but not others, in the toolbar, click Share with, click Specific people, select each person you want to share with, and then click Add. Click Share when you are finished.
To change the level of access to a file or folder, in the toolbar, click Share with, and then select either Homegroup (Read) or Homegroup (Read/Write).