Wireless network Dell Studio-Windows 7 OS Prior to vacation was able to connect to wireless home network. While on vacation was able to connect to hotel Wi-Fi. Since returning home I cannont connect to my home network. The tray icon has a red x with no signal and says no connections available. Other wireless devices are connected and there have been no changes made to my router.

Yes, firewall can block - and often some years later for no apparent reason, if the subscription has run out it can cause issue.
turn the firewall off, what is the firewall
to check if the adapter is working OK

If you cannot access the internet with this PC, then you will need to copy the program across to the faulty PC

http://www.xirrus.com/library/wifitools....
Then run the program
if you get an error - You need [URL="http://www.microsoft.com/downloads/details.aspx?FamilyId=333325FD-AE52-4E35-B531-508D977D32A6&displaylang=en"]NET Framework[/URL] installed for the WiFi Inspector to function.

Yes, firewall can block - and often some years later for no apparent reason, if the subscription has run out it can cause issue. turn the firewall off, what is the firewall to check if the adapter is working OK If you cannot access the internet with this PC, then you will need to copy the program across to the faulty PC
http://www.xirrus.com/library/wifitools.php Then run the program if you get an error - You need [URL="http://www.microsoft.com/downloads/details.aspx?FamilyId=333325FD-AE52-4E35-B531-508D977D32A6&displaylang=en"]NET Framework[/URL] installed for the WiFi Inspector to function.