This problem seems to come and go on its own. My wired Internet connection is fine, but Internet access over wireless connections disappear at times, even though it the computers show they're connected (limited), and the signal strength is fine. It appears to affect both of my wireless computers at the same time, although I'm not sure they start and stop working at the same time.
Today while the problem was occurring, I logged onto the router, went to Diagnostic and Client Monitor. The wireless connections appeared, but did not show an IP address (that box was just blank). It did show the computers' MAC addresses and that wireless was authorized.
Going to Internet/Lan and then DHCP Lease, the wireless connections were not showing there at all.
Also, on a wireless computer, typing ipconfig, the results did not show an IP address.
Rebooting the router fixed it, but this problem comes and goes, so I assume that the DHCP lease somehow gets renewed.
Again, while this problem is occurring, the Internet connection through wired computers is fine.
I'm not sure if this is normal or not, but when the router reboots, it takes it several attempts, and about 5 minutes, to find the DHCP server, so that it can connect to the Internet either wired or wireless.
Both wireless computers are runing Vista 32 bit.
Ideas?