# I'm having issues installing version (X) of Unreal Engine If you're experiencing issues installing a particular version of Unreal Engine it may be because the NDI Unreal Engine SDK requires that Unreal be installed prior to installation. The installer checks for registry keys in this install location `HKEY_LOCAL_MACHINE\SOFTWARE\EpicGames\Unreal Engine\InstalledDirectory.` If the registry keys are not there, then the installer will be unavailable and appear grayed out for that particular version. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.ndi.video/all/faq/common-issues/im-having-issues-installing-version-x-of-unreal-engine.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.