Hello,we have two desktop Pc's both hard wired to a Linksys router. One P.C is on Windows 7 system the other is on Vista. The windows 7 is connecting O.K. The one on Vista is showing " Does not have a wireless network adaptor, install & configure. The Vista P.C. was working O.K. a couple of days ago.Also not connecting to a laptop from the host computer on the Vista system Any suggestions how to sort this problem. Thanks