Microsoft.Net Framework - JIT Debugging error

Hi:

Every time I logged on to computer, above error message appears which makes it not connecting to internet.  The message as as follows:

To enable just-in-time (JIT) debugging, the .config file for this
application or computer (machine.config) must have the
jitDebugging value set in the system.windows.forms section.
The application must also be compiled with debugging
enabled.

For example:

When JIT debugging is enabled, any unhandled exception
will be sent to the JIT debugger registered on the computer
rather than be handled by this dialog box.

Any help wil be highly appreciated

Aftab