All of a sudden I no longer find my wife's computer on our wireless network. Even when I do a search on Computers it doesn't show up. Any ideas on how I can find and restore it? Thanks.

Check her network settings. Use the help and support pages for network diagnostics. I read it wrong and answer it wrong too. So get off my case you goober.

First, make sure you don't have any firewalls enabled that would be blocking access to either PC. Next, make sure you're both still connecting to the same wireless network. Go to http://ipchicken.com. If it shows the same (Internet)IP for address for both, then so far so good. If they're different, then you're connecting to different wireless networks. Next, find the local IP address for both computers. Then try browsing directly to the computer from the RUN field using the IP address. Ex. Click Start -> Run -> then in the Open field type \\192.168.1.101 (or whatever her local IP address is) and click Ok. If her computer comes up with the right shared folders and printers, here's what probably happened; Windows computers only find each other by name by broadcasting it across the network intermittently- this is called a NetBIOS broadcast. Windows computers build up a list of other local computers with shared resources using these broadcasts- this list is what you see when you double click My Network Places of if you see shared folders in My Computer. But building this list takes time, sometimes hours, sometimes a whole day, but is not an immediate process. And sometimes they forget these names, especially if one is offline for awhile. But by browsing a computer directly using it's IP address, for example \\192.168.0.100, you circumvent this process and go right to the computer without having to wait for your computer eventually "discovering" the other one's name.