Upgrade manager rec. Ubuntu12.4 which I downloaded using a wireless connection. Worked fine for 5 days then lost connectivity, can only connect using wired. Am being asked to 'authenticate ' with wireless password and admin. password but nothing works. The signal is there and so is the network but no recognition. Have also tried changing password.
Someone suggested re-installing but I would have to do that from Ubuntu Software Manager and use usb or CD.
I am a novice at this as you'll have gathered.
any help please. thanks