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Hello. Recently I have encountered several problems on my network...

I have 2 PCs one with Windows XP Professional SP2 32 bits and one with Windows Vistra Ultimate 64 bits both legit.
I have 2 network cards on the XP PC and I use Internet connection sharing to get both PCs online. The connections work ok, but I have encountered these problems recently:

1. Computers can't see each other on network. Ping Works, firewall is disabled on both, they are on the same workgroup. What can be wrong?

2. I also have a web server. This morning I could access the server, now from both PCs I can't access the server at all... Ping doesn't go through, server is up and running well(accessed it from 2 other connections, 1 from same ISP and one from a net Cafe and also tried with web proxy). I don't think I did anything to block my access to the server. Any suggestions?

Thanks

Problem 1 I can try to help you with... On the Vista PC, go to the Network and Sharing Center. Under Sharing and Discovery make sure network discovery is turned on.