WSUS failed. Error Number 80131509

You need to tell .NET to use TLS1.2 which is what the PowerShell code below does (Run it from an Administrative PowerShell Window).

1. $Properties = @{
2. Name = 'SchUseStrongCrypto'
3. Value = '1'
4. Type = 'DWord'
5. }
7. $null,'Wow6432Node' | Foreach-Object {
8. Set-ItemProperty @Properties -Path "HKLM:\SOFTWARE$("\$_")\Microsoft\.NetFramework\v4.0.30319" -Verbose
9. }