Trying to resolve event’s 1000 and 1202

I have 3 W2K domain controllers and 3 file/print/app servers with the latest SP’s and patches. Every day I find multiple errors in the event viewer: Userenv 1000 and SceCli 1202. I have reviewed MS Knowledge base implemented their fixes and still noresults. I’ve deleted the domain policy, edited it and recreated the domain policy with no results. Short of calling MS Tech Support I could use any help. Randy.