IE/Fire Fox not working.

Basically, my internet is not working. I have both IE and Firefox on the computer (I typically use Fire Fox), and any time I try to start either browser it just brings up a blank page. It will say that I have between low and good signal (wireless), but I have used it with as low as very low signal in the past. I have Frostwire on the computer, which gets perfect connection and still works fine. However, iTunes cannot connect to the internet.

I have scanned with Norton, AVG free, SUPER Anti Spyware, and Walwarebytes' Anti-Malware, and each search has come up with nothing malicious found. I have also tried system restoring to a date before I starting having these problems, and it said the restore failed. I have uninstalled Fire Fox, downloaded it on another computer and transfered it to the ailing one via flashdrive, reinstalled it and everything to no avail.

I honestly have no idea what happened to it. It was working around two in the afternoon or so, then I went to work and came home around ten and it was not working.

Any advice and help will be greatly appreciated.