Vista - "Diagnostic Policy Service" crashes on Vista Basic

Good afternoon everyone,

One of the scenarios of the "Diagnostic Policy Service" always crashes when
DPS tries to process it. This service is resposible for doing automatic
diagnosing and fixing in the background. The bad scenario creates many
errors in the event viewer. This is on Vista Home Basic.

It's always scenario {739FF6CF-5033-428C-9E2F-582096482DD5}. What is this
scenario and how can I fix this ?

For your reference, I've appended the error message below:

Diagnostic module {C0F51D84-11B9-4E74-B083-99F11BA2DB0A}
(%windir%\system32\radardt.dll) {and a couple of other .dll s} encountered
an error while handling scenario {739FF6CF-5033-428C-9E2F-582096482DD5},
instance {91DBE11E-0D91-4C8C-9C1D-99748374D11B}, original activity ID
{00000000-0000-0000-0000-000000000000}. The error code was -2147467259.
(event ID: 170, source: Diagnosis-DPS, Task Category: Scenario Lifecycle)

I can't find this error anywhere in Knowledge base, error & message center,
or google.

Thanks for your insight. Sincerely,

Paul