Windows update  could not be installed: error 2147942487

Drew Countryman
Drew Countryman used Ask the Experts™
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I am updating a Windows 10 machine from 1607 to 1803. I continuously get the following error:

Windows update could not be installed because of error 2147942487 "The parameter is incorrect." (Command line: ""C:\windows\system32\wusa.exe"

I have run through the standard troubleshooting fixes listed here: https://support.microsoft.com/en-us/help/10164/fix-windows-update-errors

Any suggestions?
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Distinguished Expert 2018

Commented:
So the update to 1803 did not finish? Or did it and you are having these problems on 1803?
JohnBusiness Consultant (Owner)
Most Valuable Expert 2012
Expert of the Year 2018

Commented:
You may need to update the BIOS (and Chipset and Video) on that machine as Windows Updates need updated BIOS in some cases I have seen here.

I updated one machine from 1607 to 1709 with a BIOS update in between.

Also make sure there is no legacy software, particularly Anti Virus. Maybe remove (uninstall) your Anti Virus and try updating again.

Author

Commented:
Event viewer gave me a message that 1803 completed successfully but the version is still at 1603. When I went to check for updates again it said that it was already up to date and it gave me the error again:

Windows update could not be installed because of error 2147942487 "The parameter is incorrect." (Command line: ""C:\windows\system32\wusa.exe"
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Distinguished Expert 2018

Commented:
1603 is non-existent. Let's make sure and look at the output of the command
winver
JohnBusiness Consultant (Owner)
Most Valuable Expert 2012
Expert of the Year 2018

Commented:
I assume the author meant 1607.  Drew - did you update drivers as suggested?

Author

Commented:
Yes, 1607. Yes I updated the chipset, graphics and BIOS drivers.
JohnBusiness Consultant (Owner)
Most Valuable Expert 2012
Expert of the Year 2018

Commented:
Run a Windows 10 Repair Install using the USB key and running Setup.

Go to the Media Creation Link:
https://www.microsoft.com/en-us/software-download/windows10

For Windows 10 V1709 and prior:
Windows 10 is running, so click on the Download button (not Upgrade Button, select Open (Run) but NOT Save. Allow the program to run. Allow drivers to update. Then select Keep Everything.
You can also Keep Data, or Keep Nothing. Keep Nothing is very close to a clean install.

For Windows 10 V1803:

If the Repair will not run as per above:
Create a USB Windows Installation key and then run Setup on the USB Key.
This will launch the Repair and proceed normally.
I was able to get the updates going by renaming the hidden Windows BT folder listed under C:\$WINDOWS.~BT
There must have been a corrupt file in there, the updates started to download and install after I rebooted.
Distinguished Expert 2018

Commented:
Self-solved by the author. Author forgot to close.

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