Hi rod, do you mean you've been deleting Windows system components as well, not just your own installed programs?

If you happened to delete either jscript.dll or the scrrun.dll which are normally present on a regular Windows install then that would definitely break MoI v2. You might try re-installing Internet Explorer to get those files back. If you're on XP you can also try this download here:
http://www.microsoft.com/en-us/download/details.aspx?id=8247

In MoI v3 I've changed the script engine that is used so that it does not depend on the system script engine anymore and instead has one built in to MoI's own directory so MoI v3 will be more resistant to damaged Windows installations than v2.

- Michael