Hope this is right place (if not please excuz and pass the info to appropriate place); but I got info to disable Cryptographic Services (has nothing to do with EFS) on my XP box when running services.msc to save on resources. Info came from post dated 12/2002 (Frudo?).
Think that particular info might outdated 'cuz the service is required to install XP patches. I threw mine on Manual. Just thought I'd share this since I learned so much from this place.