When pressing F1 over a keyword or selecting "Contents" or "Index" from the Help menu in VB6.0 SP3, I am receiving the following error message : An Unknown error has occurred.

I would rather not uninstall and re-install VB. Anyone know what could be wrong? Everything was fine a week or so ago. I've installed (and since uninstalled) an SQL tool (RapidSQL) which may have done something.

Thanks