====== Install Error: "A DLL required for this install to complete could not be run." (Rhino 5 for Windows) ======
> **Summary:** //How to fix the installation error: A DLL required for this install to complete could not be run.//
> **Related installation help:** //[[installproblems|Troubleshooting Rhino 5 Installation]]//

=====Problem=====
Installation fails with a missing dll message like: 

**//There is a problem with the Windows Installer package. A DLL required for this install to complete could not be run. Contact your support personnel or package vendor.//**

=====Answer=====
It may be that a virus scanner is getting in the way. Try disabling any virus scanners and retry the installation. 

Or your system may be missing important **Windows Updates**. See how to check for Windows updates [[http://wiki.mcneel.com/windows_updates|here.]]//

{{tag>rhino5installationerror_en}}