See the following articles in the MS knowledgebase Q166828, Q162205, Q162837.

Vlad

>I recently installed NT 4.0 (SP3) on my home PC because I needed the extra security and robustness. On occasion, I get KMODE_EXCEPTION_NOT_HANDLED in the blue screen of death. What does this mean and what can I do to fix it?
>
>TIA,