On the win 7 laptop It says connected to my wireless network but its not.
when problem and running windows diagnostic I get the message 'gateway does not exist'
any suggestions please? It used to see network ok and other laptops etc have no problem.
Something has gone wrong in your settings. Press your Windows key and R at the same time and into the Open box, type
cmd /k ipconfig /all
including all the spaces. In the black form that follows wil be an entry named Default gateway and you need to note the numeric code beside that entry - something like 192.168.2.1. If there is no Gateway, that tells us something.
Right click anywhere in that black form then scroll to SelectAll. Hit the Enter key and thta puts all that content into your clipboard. Control and V together will paste it into a Notepad document or straight into the Reply form here at Tom's so paste it back sso we can see what's going on.