[CentOS] Should I upgrade Samba 3.6 to Samba 4.1

Hi,

I just installed Samba on my Centos 6.4 computer.  Smbstatus says my 
version is 3.6.9-151.el6-4.1.

My smb.conf file only has a [global] and [homes] section.

My configuration works, as expected, from a Win7 Virtual Box computer 
and a Win8 Virtual Box computer. I can see the share from the Windows 
file explorer and can map the share to a network drive. The Samba server 
is not virtual.

The problem is my wife's Win7 laptop which is running some sort of home 
edition of Win7.  I did everything I could in control panel to enable 
file sharing but I still can't see the Samba share.  I can ping the 
computer running Samba?  I tried to launch "gpedit.msc" but this program 
was not there.

Do you think it would work if I upgraded Samba to the latest version 
4.1?  Should I consider upgrading to Win7 professional?

Thank you,
Joe Hesse