The command to run to speed up WSUS downloads depends on which installation option you chose when installing WSUS or if you are running SBS server. When you run this command WSUS will take as much bandwidth as possible to download windows updates faster but it can also saturate your internet connection and possibly slow down your windows server.
Windows internal database:
“%programfiles%\Update Services\Setup\ExecuteSQL.exe” -S %Computername%\MICROSOFT##SSEE -d “SUSDB” -Q “update tbConfigurationC set BitsDownloadPriorityForeground=1”
SQL Server
“%programfiles%\Update Services\Setup\ExecuteSQL.exe” -S %Computername% -d “SUSDB” -Q “update tbConfigurationC set BitsDownloadPriorityForeground=1”