Home network access denied

I can only access certain files on all computers how do enable access to all have already checked Control Panel
Administrative Tools
Local Security Policy
+ Local Policies
+ Security Options

Network Access: Do not allow anonymous enumeration of SAM account, and shares. (Disabled)

Is this a firewall issue?

I think that this is probably as simple as ticking the right box. But i am still somewhat computer illiterate (can take direction quite well though)

Also how do i attach a print screen ( or any pic) here, was trying to show the exact error msg, but could not copy pic here is that because this only allows or converts to HTML

Cheers