Ok, I now have the "offending" computer running perfectly. But Boinctasks still sticks for no reason. It's monitoring four computers: itself, and three others on a fast local network. There is no reason for this sticking. Why does it keep stopping responding? There's spare CPU time on all computers, yet it just stops talking to the other machines for no reason. Any other communication between the computers works fine, eg file transfers, remote desktop, etc. Boinctasks seems to have a very flimsy connection, often requiring the toolbox to persuade communication to work. Can't this be reprogrammed to function better?