I have recently tried to download the unreal engine however when installing the EpicGamesLauncher it comes up with a error message saying “There is a problem with this Windows Installer package. A program run as part of the setup did not finish as expected. contact your support personnel or package vendor.” PLEAS HELP!
Take a look at this thread: https://answers.unrealengine/questions/50206/i-cant-get-unreal-4-to-install.html 
When it doesnt solve your problem, make sure to post it onto answerhub. https://answers.unrealengine/index.html
ill try thanks for the help