This is as good as writing "it's not working." Since it worked 2 days ago I suggest you backup what you can't lose then use System Restore to 2 days ago. Diagnosis is not possible with so little detail and while I have other ways to restore the machine, we can't endanger files so we always perform out backup before we begin repairs.
I am a very strange encounter.... I have a Toshiba L655, running Windows 7 home premium 64 bits. It was working fine until 2 days ago... I lost Internet connection even through I have full (5 bars) strength... I have a gadget on the computer called Network meter and it shows I have Internal IP but not external. EXTERNAL=NO connection... any idea, any one? Can anyone Please give me some idea what to do? All of my assignments and works are on the computer and it is working (just without ANY connection to the Internet)... Try to connect with wire LAN too but same problem.... also borrow one of those USB kind that use to connect to the Internet, still not working even with full 5 bars and computer is showing internet connection.... just don't seem to be able to get online at all.... PLEASE HELP!