I do not have One Care installed.
experiments I tried:
disconnected from internet, disabled both firewalls.
symtpoms remain the same.
I have a 4 port switch casscaded to a 4 port router to extend my network. I simplified and connected to just the switch and then just the router. Still no change to symptoms.
To be able to connect to another machine on my network running XP Pro SP1 I had to enable IPX/SPX/NetBios compatible protcols in network settings. I experiemented by unchecking and lost access. I rechecked the protocol and gained access again.
I downloaded and installed on both my XP machine and the Vista machine.
I used McAfee Security Suite on all my machines as it is provided free by Comcast (my cable internet provider) On every machine under, "Manage Network," every machine is seen with it's TCP/IP address. Every machine has trusted IP's in the range set by the router.
When I use, "Diagnose," on the Vista machine in the box that says it can't find my machine, the error message states that, "Windows sent the request to the DNS server and the server responded that the name was unknown."
I have a dual boot machine so I booted to Windows Vista RC1. In RCI both the Vista laptop and my machine could see and access the other machines on the network. When I rebooted both machines, the laptop still showed the connections but no longer could acess my machine. The laptop can access every machine but mine.
On my machine in Local Area Connection Properties I have the Link-layer Topology Discovery Responder checked on both machines. Vista also has Link-Layer Topology Discovery Mapper I/O driver checked.
I have read knowledge base articles. I have rebooted both my machines dozens and dozens of times, changing just one thing at a time. I am still stymied.
EggHeadCafe.com - .NET Developer Portal of Choice