Hi, I think that there is a personnal firewall with pc cillin. Check for configuration, to allow access from your two pc. Open the port 80 and more if needed. Hope this help Anthony Paillard ----- Original Message ----- From: Rod Falanga To: windows2000@xxxxxxxxxxxxx Sent: Sunday, June 26, 2005 4:52 AM Subject: [windows2000] Trend Micro seems to be blocking anyone from access my PC I've got a simple peer-to-peer network at home, two Windows XP Pro desktops and one Windows XP Pro notebook. I've written an ASP.NET application which runs in IIS on one of the machines, and the other two machines to reach my ASP.NET site just fine. Recently I put Trend Micro's PC-cillin Internet Security 2005 onto all three machines. Now none of the other two machines can reach my ASP.NET site. Why is that? Rod