I also have this problem. I purchased a built system with Vista Home Premium 64bit with a Realtek 8185 wireless card. I started off with just Local Only (no Internet) after going through dozens (atleast 50) pages and tips I got the internet working after
a mixture of things (IPV6, changing channels on router, resetting router, new drivers, etc...). But I still get random disconnects from my internet, much slower speeds than my XP laptop which is 2ft from my Vista machine, and very bad latency while running
games. I've also ran traceroutes to multiple addresses and everytime I can get past 15 without it disconnecting.
Router: Linksys WRT54GS v6
Wireless Card: Realtek 8185 Extensible
When running a wired connection I have 0 issues, I also can connect to other wireless networks and have the same issues. I cannot go through with the link presented cause I am unable to find out which registry key is which for my adapters.