Networking issue, please help!!!

Thanks in advance for the help. I am having trouble accessing another computer on my network. Here is the layout.

Computer 1 is my desktop running on Windows 7 Ultimate (LAN connection)
Computer 2 is my laptop running on Windows 7 Ultimate (Wireless connection)
Computer 3 is my brothers laptop running on Windows XP (LAN connection)

Computer 1 detects only Computer 2 on the network
Computer 2 detects Computer 1 and Computer 3 on the network
Computer 3 detects only Computer 2 on the network

All three are in the same workgroup. How do I get Computer 3 to detect Computer 1 so that I can share files between the two (and vice versa)?
5 answers Last reply
More about networking issue help
  1. You have sharing enabled and folders shared on all computers?
    Can the computers ping each other?
    Have you checked firewalls?
  2. You have sharing enabled and folders shared on all computers? - Yes sharing is enabled on all 3 computers.

    Can the computers ping each other? - How do I check if computer 1 can ping computer 3?

    Have you checked firewalls? - Yes, the firewall settings allow file sharing between the network.
  3. cmd prompt
    ping <ip address>
  4. Yes they can ping each other
  5. Its weird b/c computer 2 can detect all the computers on the network, I dont know why computers 1 and 3 cant detect each other.
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