Couple of options for you;
1) Remove the Belkin software from add and remove programs and run ccleaner click here and reboot the pc.
Reload the software for the Belkin adaptor.
2) As above,remove the software and use the wireless network setup wizard in control panel/classic view.
You will need a flash/pen drive to carry the wireless settings across from the host computer.
Just follow the prompts.
Depending on the model of the Belkin adaptor,you may find you will need the software as the xp driver may not work....though unlikely.
I have a cable and wireless adaptor fitted on my test machine,the xp driver will not run this...so the software is needed.