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Windows 7: Won't discover other computers

13 Mar 2011   #1

Win-7 64-bit
Won't discover other computers

I have a problem many people seem to have and I have spent many hours/days trying to fix it unsuccessfully. I have one Win-7 SP1 64-bit computer and several other Win-XP SP-3 32-bit computers on a gigabit home network with a Linksys RVS 4000 router.
  • All computers have the same workgroup.
  • All computers have internet access.
  • All XP computers CAN ping the other XP computers and the XP computers CAN browse to the other XP computers by entering the IP address: \\192.168.blah.blah.
  • The Win-7 computer CAN ping the XP computers and CAN browse to the XP computers by entering the IP address: \\192.168.blah.blah.
  • The XP computers CANNOT ping the Win-7 computer and CANNOT browse to the Win-7 computer by entering the IP address: \\192.168.blah.blah.
  • IP6 is DISABLED on the Win-7 machine.
  • Netbios is ENABLED on all machines.
  • Win-7 computer is set to Home Network and all Advanced Sharing Settings permissions are ON; Network Discovery, ON; File and Printer Sharing, ON; Public Folder Sharing, ON.
  • Win-7 computer shows HomeGroup as Joined and will not let me leave the HomeGroup.
  • Windows firewall on XP computers is disabled. Norton firewall is up, but it has always been up and I have tried disabling it with no change. Win-7 computer does not have Norton yet and I have not fooled with Security Essentials.
I don't know exactly when it started happening, but:
  • The computers do not show each other on the Windows Explorer Network page, In the Win-XP computers, only the folders that were added manually do show up. But there is no AUTOMATIC discovery.
  • The XP computers all get an error if I try to access the workgroup from Network Neighborhood by exploring for computers, saying the Workgroup server is not available or I don't have access.
  • The Win-7 network screen only shows the Win-7 computer itself and none of the XP computers. It also shows other network devices as it should, however.
  • At times, although I can't replicate it right now, the XP computers will show the others, but won't show the Win-7 computer, if I go through the network connection set up wizard in IE8. If i reboot, the access seems to go away...but I cannot make them show up now.
  • At times, but not now, I have been able to see all network computers on the Win-7 computer.
I have tried everything I can find, including changing one networking key in the registry on the XP machines from an 8 to a 1. This worked for other people, but didn't change anything for me.

Any suggestions would be appreciated.

My System SpecsSystem Spec

13 Mar 2011   #2

Win7 Enterprise, Win7 x86 (Ult 7600), Win7 x64 Ult 7600, TechNet RTM on AMD x64 (2.8Ghz)

Welcome brossyg

You are using a Business type network (WorkGroup) right ? Not the new Windows 7 Homegroup ? Have you gone over the settings in the Windows 7 computer. Here is mine:

Attached Thumbnails
Won't discover other computers-network_options.jpg   Won't discover other computers-network_options2.jpg   Won't discover other computers-network_computers_13.jpg  
My System SpecsSystem Spec
13 Mar 2011   #3

Win-7 64-bit

My Network is set to Home network and my Advanced Sharing Settings are all the same as yours, except for media streaming (mine is on). I tried changing it to a Work Network and refreshed the computer list (also rebooted) and nothing changed. Also, this wouldn't account for the lack of discovery on the XP machines.
My System SpecsSystem Spec

13 Mar 2011   #4

Win7 Enterprise, Win7 x86 (Ult 7600), Win7 x64 Ult 7600, TechNet RTM on AMD x64 (2.8Ghz)

8 of the above computers are XP, 5 are Windows 7. On the Windows 7 computers I have to set sharing on the individual folders I want shared. Share with Specific people, then Add Everyone , then save with the Share button at the bottom.
My System SpecsSystem Spec
13 Mar 2011   #5

Win-7 64-bit


Yes...this is how I did it as well. Howver, this is folder specific and shouldn't effect how the Network discovery works....should it? My problem is that Network discovery is being blocked somehow. I have no problem sharing files once I navigate to another computer via the IP, but in the Network Neighbor hood, the computers are not displayed automatically as they should be.
My System SpecsSystem Spec
13 Mar 2011   #6

Windows 7 Ultimate x64 SP1

Instead of disabling Norton, remove it and reboot. Configure the XP (and Windows 7) firewall to default settings. See what happens.

Also, on the Windows 7 computer, hit the Windows key and type "homegroup", then press enter. Do you get a message saying there is currently no homegroup on the network, or do you get a different message?
My System SpecsSystem Spec
13 Mar 2011   #7

Win-7 64-bit

Will try uninstalling Norton, but when I type homegroup in, it says "This Computer belongs to a homegroup." and then goes on to say that i haven't shared any libraries with your home group."
My System SpecsSystem Spec
13 Mar 2011   #8

Win7 Enterprise, Win7 x86 (Ult 7600), Win7 x64 Ult 7600, TechNet RTM on AMD x64 (2.8Ghz)

Sounds like your Windows 7 computer is still setup as the New Windows 7 Homegroup. This won't share with XP computers.

Try this tutorial Homegroup - Leave

Then set up you network as a Work Network
My System SpecsSystem Spec
13 Mar 2011   #9

Win-7 64-bit


I completely uninstalled Norton on one of the XP computers. I can now ping the Win-7 computer using the IP address from the XP computer, but if I try to view the workgroup in the network part of in Windows Explorer, it still tells me I don't have access and that "A list of servers for this workgroup is not currently available."

Also, I have tried and tried to leave the homegroup on the Win-7 conmputer and I get "Windows couldn't remove your computer from the homegroup." no matter what I try.
My System SpecsSystem Spec
13 Mar 2011   #10

Windows 7 Ultimate x64 SP1

Some people have had success fixing this problem by running the home group troubleshooter. Some have had a firewall config problem that, when corrected, allowed the Windows 7 computer to leave the home group. Give that a shot.
My System SpecsSystem Spec

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