If the Update option isn’t available or you can’t update, use Microsoft Update to install Office updates via Windows. Try fixing your Office suite if you want to upgrade Office but can’t access any of your Office apps. Microsoft has issued a warning to Windows 10 customers, stating that recent upgrades have a number of problems. One of the vulnerabilities, according to reports, prohibits users from upgrading Office programs owing to a certificate loss issue. When trying to install the newest Office updates after downloading the October 2020 Patch Tuesday patches, some Windows 10 users saw an error message that stated, “Download of Office 365 file failed, error =.” Because Microsoft has yet to release a fix for the issue, users will have to remove the flawed Windows update, update Office, and then reinstall the Windows patch. Updates are not permitted Unfortunately for Microsoft, the Office update error isn’t the only problem with its Windows updates that consumers have recently encountered. File Explorer problems and even the dreaded Blue Screen of Death have also been reported as a result of the October Windows 10 updates. https://www.unlicensedproduct.com/microsoft-office-update-error/