Windows Diagnostics Service Error

Hi

I'm having a problem with my Windows Vista laptop. It cannot connect t
the internet wirelessly. When I try and run "Diagnose and Repair" I ge
an error message telling me that Netowrk Diagnostics cannot run becaus
the Diagnostics Policy Service is not running. When I try to start th
Diagnostic Policy Service I get another error message telling m
"Windows could not start the Diagnostic Policy Service service on Loca
Computer. Error 5: Access is denied" Please help.

I'm using a Fujitsu Siemens Amilo Laptop.

I don't know what to do. Please explain solution in simple
non-technical terms. Thank-you in advance