Anyone ever see the following errors?

Error 5800:3022

Unable to stop non boot processors. The system might be unstable and should be rebooted.  dirty Cache reads test

5800:0222  same msg.  alternating cpu writes test

5800:0422  same msg. random access thrash test

Any thoughts? Suggestions?  Fortunately, this machine was a "Freebie"  Having fun though.  Heh, at my age, most anything can be made turned into fun.