Cannot connect Win 7 Pro PC Win XP Workgroup

Win 7 Pro 64 Bit PC, I see the Win XP PC if I'm typing \\name in the search box or line URL but the connection disappears as soon as I close the Explorer. They do not appear under network.
I do not see the Win 7 PC to any Win XP PC and can't do their ping
I tried to disable the firewall from Win 7, but that did not help.
I tried to change the network ID on 2 PC different of XP, but it does not work:
Right click on desktop, select Properties
Click Network ID - watch computer belongs to a domain that is not, there is no server
changed by not part of the domain
changed the name of the workgroup is same as name of working group in the main screen
Save the changes and reboot
When I go back to look at the changes are not made, back on the field and bad name working group (the "working group")
What could be blocking me to change the settings for XP? I am logged in as administrator (the only user on all XP PC).

Thanks for the links. I tried all settings suggested and many more other items, but I still can't Win 7 Pro SP1 from PC to see the Win XP Pro SP 3 pieces.
Even tried stopping IPv6 and changed sharing encryption 40 or 56-bit
All Win 7 PC can see another Win 7 PC and all the XP PC can see all other XP PC.
I Ping the PC XP from Win 7 PC, but I can't Ping a Win 7 PC to any PC in XP.
The Win 7 PC IP addr are 192.168.2.xxx, the XP IP addr 192.168.1.xxx.
This would be a router issue?

XP cannot recognize the Homegroups Win7 so machines Win7 need to be networked by using user accounts and passwords.

All the computers are in the same workgroup and the same subnet (IE. 192.168.1.x AND 192.168.2.x)

You did not say as much, but it seems that if you are using 2 routers, or a router, and another device that is also using DHCP to assign a different range of intellectual property of the numbers on your local network. There should be only one DHCP server on the network. If you are using 2 routers, rewire inter-connexions such as only one router is the only DHCP server and offering all services while the second router routing simply acts as a switch with no routing service.

The type of network for Win7 computers must be set to home or work. Choice work avoids having to deal with getting rid of the default settings of the homegroup.

Make sure the network discovery and file & printer sharing turned on for home or work on Win7 computers networks

Regarding access to shared files, etc., XP computers must connect to a Win7 computers with the user name and password of a user on the Win7 machine. The commonly recommended solution is to create a single common username with the same password on all computers on the network. (If you find a better way, I wonder if it's me)

Encryption level should not affect the connectivity (high is best) as long as it's the same for all machines.

The Win7 firewall may be set by default to block incoming Pings, or it might be your router configuration. Anything from an IP address 192.168.1.x could be regarded as an external network by the 192.168.2.x router connection and incoming Pings can be blocked because of this.

Tags: Windows

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