Heres something random.
I have two wireless PCs, call them PC1 and PC2 and a wired pc, PC3

PC2 acts as a nice little storage computer for when i want to store data (obviously). Everything works perfectly until PC1 attempts to communicate and get data from PC2, when this happens PC1 and PC2s networking seems to just die and the only pingable/existing thing is each other... not even the router that they're connected to exist... they both behave like this until they both restart, even when the copy process has finished they still act in this way.
They both can 'talk' to PC3 ok though without any problems, except when this problem occurs because the system doesnt exist.

WTF is causing this and how can this be solved, because ideally I want it to work as my printer is attached to PC3 and I want PC1 to print stuff to.

SOunds like it's screwing over and somehow making it's own separate network and bypassing the router. No idea how this could happen and why. Tried fiddling with settings?

I know this sounds mad, but PC1 is a Vista machine isn't it?

Vista has problems with some wireless routers, causing them to disconnect either themselves from the network, other computers, or all computers and the Internet connection. I know there is an incompatibility between any version of Vista and the Netgear DG634PN.

Yes, the first PC runs Vista, the 2nd PC runs Server 2008 (so yea both vista basically)

This problem randomly popped up out of nowhere... maybe Ill give SP1 a whirl...

I knew I should have stuck a "blame Microsoft" in there!