Hi,
If you are admin account and unable to uninstall McAffee tool, please check if the following tool could help uninstall it:
https://kc.mcafee.com/corporate/index?page=content&id=KB90895
(Please note: Information posted in the given link is hosted by a third party. Microsoft does not guarantee the accuracy and effectiveness of information.)
If it still not work, it's recommended to contact McAffee supporter.
After uninstalling McAffee, please check if you can install Windows Update successfully.
Thanks for your time!
Best Regards,
Anne
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