Unhandled exception at logon

Dec 15, 2012 at 10:39 PM

Has something changed as I now can't use the live upload.

I get to the point of logging on to face book and get a

Unhandled exception has occurred in a component iin your application. If you click Continue, the application will ignore this error and attempt. to continue.

Could not load file or assembly 'System, Web. Version=2.0.0.0.Culture=neutral. PublicKey Token=b03f5f7f11d50a3a' or one of its dependencies.

I'm using Win7 x64

Any ideas?