>Check out the following MS KB articles:
>
>Q151427 - deals with installing new services after service packs are installed
>Q126401 - PagedPoolSize setting for memory not set correctly on NT Workstations
>Q106167 - accessing shares on an NT machine causes the error
>
>My guess would be the new service installation. To correct that, you have to reinstall the service pack.
>
>Good luck!

Thanks Larry;

PagedPoolSize is already set as the article suggests.
The suggestion of installing SP 4 crashed the PC. Maybe I'll try SP 5. These 2 PCs are HPs with some integrated components. All the others, which are working fine, are regular IBM clones. I wonder if I should give up on this hardware?