Determine .net Framework version

Open an elevated PowerShell window (Start > right click PowerShell > Run as Admin)

Copy the following code block and hit enter:

$Lookup = @{

378389 = [version]'4.5'

378675 = [version]'4.5.1'

378758 = [version]'4.5.1'

379893 = [version]'4.5.2'

393295 = [version]'4.6'

393297 = [version]'4.6'

394254 = [version]'4.6.1'

394271 = [version]'4.6.1'

394802 = [version]'4.6.2'

394806 = [version]'4.6.2'

460798 = [version]'4.7'

460805 = [version]'4.7'

461308 = [version]'4.7.1'

461310 = [version]'4.7.1'

461808 = [version]'4.7.2'

461814 = [version]'4.7.2'

528040 = [version]'4.8'

528049 = [version]'4.8'

}

# For One True framework (latest .NET 4x), change the Where-Object match

# to PSChildName -eq "Full":

Get-ChildItem 'HKLM:\SOFTWARE\Microsoft\NET Framework Setup\NDP' -Recurse |

Get-ItemProperty -name Version, Release -EA 0 |

Where-Object { $_.PSChildName -match '^(?!S)\p{L}'} |

Select-Object @{name = ".NET Framework"; expression = {$_.PSChildName}},

@{name = "Product"; expression = {$Lookup[$_.Release]}},

Version, Release