Error Message on some files

[CVGRJordan]

I get an error message when opening certain files that contain Macros, it only happens on one PC I can open the same files on another PC without any issues. The error I receive is
"Class not registered. Looking for object with CLSID:{AC9F2F90-11CE-9F68-00AA--574A4F}"
What can I do to resolve this issue?

[DNA]

I would start with checking their Macro Security:

Tools > Options > Security

You'll see where and what to check. Hope it helps.

[CVGRJordan]

I would start with checking their Macro Security:

Tools > Options > Security

You'll see where and what to check. Hope it helps.

I have checked this and even changed it to low, same error message. It only happens with some workbooks with Macros, other workbooks with similar Macros I am able to open and run.

Forgot to mention earlier it is Excel 2000 that is installed on this computer.