Hello!
Looking at your Speccy report, another issue I found is that you have Windows Defender enabled, but you also have Avast! disabled. If you want to use Windows Defender as an antivirus, a good idea will be to uninstall Avast (you will also have to download the cleanup from Avast to completely remove the antivirus). If you want to use Avast! Antivirus, then disable Windows Defender and turn on Avast!
After fixing the RAM sticks and keeping one of the two antiviruses, can you now use Windows Update properly?
-CKing