Stop the Windows Update service, Remote access connection manager Certificate propagation
Move the “SoftwareDistribution” folder to the desired drive. Now there will be no folder named “SoftwareDistribution” in the path “%systemdrive%\Windows”.
Now open the command prompt in “Administrator” mode (Type “cmd” in start menu search box and press ctrl+shift+enter)
Change to “Windows” directory by issuing the command “cd %systemdrive%\Windows”
Now use the command “mklink” to create a junction point to the “SoftwareDistribution” folder, that you moved to a different drive. The command is “mklink /J SoftwareDistribution d:\softwareDistribution”

d:\softwareDistribution is the new destination

reboot then check for updates