Open Windows Powershell & Run the following Commands to make file permissions 400 in windows –
C:\Downloads\Key-Location> icacls.exe keyname.pem /reset
C:\Downloads\Key-Location> icacls.exe keyname.pem /grant:r “$($env:username):(r)”
C:\Downloads\Key-Location> icacls.exe keyname.pem /inheritance:r
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