I am unable to start or open project unreal also clocks my computers CPU to 100%
I need a little bit more information.
How and where did you install the 'Epic Games Launcher?
Do you get a error or something?
Is this happening with Epic Games Launcher or Unreal engine?
For now I can give you a few thing that can help.
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Run Epic Games as administrator.
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Reinstall Epic Games. Download - Unreal Engine Make sure you get the launcher directly from original source.
I hope this will help you.