>Hi Dragan,
>I will not solve you problem, but I will try to share our experience.
>We use CryptAPI to create an encrypted application for the customer(this was his decision). We have the symilar problems with different versions of IE.
>There are appear that IE share some .OCX with other application. If you change this OCX you crash the system as us a six months ago.

Still doesn't explain why does IE care about my app's files being deleted. The OCX is most probably in common use, and it surely wasn't in any of these directories - but you may have a point. IE may track who (namely, which app) installed the latest version of the OCX, and check the installation of that app. Seems like an overkill of a check, though - instead of checking just the OCXes it uses, it checks the entire app which last mentioned it in its install.