I have occasionally gotten an error message that Dw15 has screwed up and needs to shut down, but everything else seems to work OK (except I usually can't get rid of the error message itself except by shutting down and restarting). What is Dw15?

Thanks, Tellywellies. DW15.EXE is in C:\Program Files\Internet Explorer. The "screwed up" was my language, not theirs (I think they said something like "encountered an error and needs to close").

I'm still not clear why I couldn't get rid of the message itself after closing down IE (tried the "X," right clicking the icon on the task bar and then "Delete," and Cntrl-Alt-Del.

Try this:

Go into the Control Panel.

Double-click Add/Remove Programs.

Have you got an entry there called, 'Internet Explorer Error Reporting'?

If so, click 'Add/Remove' and remove it.

If you haven't got that entry, go to the DW15.EXE file in C:\Program Files\Internet Explorer, right-click on it and choose 'Rename'. Rename it to DW.EX This will stop it working. If no ill-effects are apparent just leave it at that.

This is more of a 'workaround' than a cure. There could be a reason for the message popping up but just see how things go.