It sounds to me like you have a problem with your Microsoft HTML Help installation.

This article describes how to manually remove and re-install HTML Help : http://support.microsoft.com/default...b;en-us;201420

However you are running Windows XP which treats these files as system files and does not allow you to manually modify these files.

According to the article, if you re-install XP Service pack 1 it should refresh the HTML help files.

I would also check to see if you have any anti-virus packages running, especially anything that blocks scripts and Active-X controls, if so, I would suggest disabling your Anti-virus package and see if that makes a difference.

DrCamel