Solved Windows Firewall Blocking LAN Connection

I have some shared folders that others need to access via a Windows 7 VM. Suddenly they can't, an error saying device is not responding. If I disable Windows Firewall on my PC (Windows 8.1) they can connect. However even this is a problem because they need to enter username and password even tho password protected sharing is off.

I've tried adding a rule allowing the VM port but it didn't help. File and print sharing, Network Discovery, Remote Desktop and Remote Assistance are all enabled in the firewall.

I don't know what else to try. Pinging my IP just times out also unless the firewall id off.

Any help?

UPDATE: I just enabled NETlogon Service and I can connect but it still wants a username and password which is definitely turned off

UPDATE 2: Got it working:
Control Panel
Administrative Tools
Local Security Policy
Security Options
set “Network access: Sharing and security model for local accounts” to “Guest only – local users authenticate as Guest”

very interesting, thanks