When I close Outlook 97 it appears to stop reponding with an eggtimer. I have to close it by Ctrl-Alt-Del (which says it has not stopped reponding). When it finally closes I get the message that Thorconwndclass has stopped reponding either wait or close. I note that the emails are not being deleted from the mailserver and when starting Outlook again it runs veeerrrry slowly! In fact the whole computer slows right down. There are only 4-5 threads on google and these are not helpful. Microsoft knowledgebase has not trace of it and a search of the PCA site turns up nothing! Does anyone know what Thorconwndclass is (where to look for info etc) and even if it is connected to Outlook?! Thanks.