原文:https://answers.unrealengine.com/questions/331994/410-installation-failed-with-error-r-1638.html
As others have already noted, this is a rather common problem that people seem to be encountering. I've experienced it myself, as well. There's a couple things to check and do if you're running into this issue, as outlined below:
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Be sure that the version of Windows you are using is fully updated.
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Head to C:\Program Files (x86)\Epic Games and be sure that the engine hasn't already been installed previously. Delete any existing installs that might be causing a conflict.
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Try and uninstall "UE4 Prerequisites" from the control panel.
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Attempt to uninstall and re-install the launcher and download the engine.
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Try and install "UE4 Prerequisites" manually, by accessing the exe here: C:\Program Files\Epic Games\4.10\Engine\Extras\Redist\en-us
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Remove VS 2015 C++ redistributable x64 and x86. You can reinstall them after you've fixed the engine issue.
It is likely that following these will solve this problem, as illustrated by others already. If you still have trouble, reach out to Epic.
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