First, you'd want to temporarily try disabling Firewall and check.
Open the HomeGroup troubleshooter
If your computer is having problems viewing computers or shared files in your homegroup, try using the HomeGroup troubleshooter to fix the problem. It makes sure that your computer's different network services are running correctly, and that your computer is
a member of a homegroup.
Open the HomeGroup troubleshooter by clicking the Start button, and then clicking
Control Panel. In the search box, type troubleshooter, and then click
Troubleshooting. In the left pane, click View all, and then click
HomeGroup. If you're prompted for an administrator password or confirmation, type the password or provide confirmation.
• The homegroup password might have been changed on a computer that was then immediately turned off or went into a state of sleep or hibernation, but the new password wasn't immediately entered on the other computers in the homegroup. If this is the case, the
new password won't be recognized on the other homegroup computers. To fix this problem, turn on the computer where the password was changed, and then enter the new password on the other computers.
If you still can’t access your homegroup, there might be a problem with your network. To run the Network troubleshooter, right-click the network icon (
or ) in the notification area of your taskbar, and then click Troubleshoot problems.
Sometimes, restarting your computer or leaving the homegroup and then rejoining it might help you access the other computers on your homegroup.