I do not have this Hotfix installed and have not needed it for very reliable wireless operation. So now a couple more options: (1) Make sure you have upgraded Vista to SP2. That may help; and (2) consider that the LinkSys router may not be compatible. I had to change both router and print server when I moved to Vista. Yes, it cost a small amount of money, but I have never looked back. The savings in productivity and not wasting time were enormous.
... Thinkpads_User