Cannot Repair Member File [l:32{16}]"Amd64CNBFUS.DLL"

I have a computer at work that my boss is using for autocad designs and it's been giving him problems for a while. He believes it's a problem with motherboard and wants me to replace it. I am not so sure it is a problem with the mother board in the first place. When he shuts down the pc it performs a loop-restart few times before it boots up into windows. I had updated all my drivers, performed full antivirus scan and nothing showed. I had performed elevated chkdsk command and everything is perfect. I had also performed a elevated sfc /scannow and got a response stating windows resource manager was unable to fix the problems, I had restarted the computer and performed same operation few times to ensure it could not fix it. I am out of options and I do not want to replace his motherboard considering I would have to reload all his engineering programs he uses such as mathcad autocad inventor programs that cost a lot and is a real pain in the you know what when you are transferring licenses (new motherboard is considered a significant upgrade that will change bios version, I spoke with several technical members). Computer he is running was build by his son-in-law. Here are the specs:

System Model: X58A-UD7
System Type: x64-based PC
Bios Manufacturer: Award Software International, Inc.
Release Date: 12/23/2010
Bios Version: ACRYS - 42302e31
Bios Version: Award Modular Bios v6.00PG
Board Product ID: X58A-UD7

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