Launch error - problem with "mscoree.dll"

Thank you for the information. This issue is probably not related to UE4, and could possibly be caused by a corruption in the Microsoft Windows SDK.

You may wish to attempt troubleshooting the mscoree.dll issue with the information provided on this website:

If you are able to determine that there is an issue with the UnrealEngine4, please let us know.

Cheers!