Office 365 Error message 0x8004FC12 if malicious bytes are used

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If you have recently upgraded to Windows 10 Creators Update and experience frequent Office 365 failures, this article provides a working solution. In some cases, after the Windows 10 upgrade, it was discovered that the Microsoft Office 365 application repeatedly prompted users to enable it when they opened it. However, if a valid product key was entered, an error was displayed:

We’re sorry something went wrong and we can’t do it for you now. Please try again later (0x8004FC12)(2)0x8004FC12

Office error message 365 0x8004FC12

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Users could not open and use Microsoft Office applications such as Word, Excel. Microsoft has detected and reported this problem.

The problem persists with people running malicious bytes antivirus software. It prevented users from saving a file locally or on a network share and displayed the following message. Users were also prohibited from copying large amounts of data from one file to another or from one application to another (e.g., copying and pasting Excel into Word) and from pasting any Word image.

If you are concerned about this problem, try the following.

The problem is caused by a conflict with the Anti-Exploit module in the byte of the antivirus program. To remove this,

Start the malicious bytes and select the’Settings’ tab in the left pane.

Then click on the Protection tab at the top. And select the Manage Protected Applications option below.

Later, scroll down in the Protected Applications window to find Microsoft Office PowerPoint and turn off protection when found.

Finally, click OK.

Please note that the screenshots above contain instructions for the Microsoft Office PowerPoint application. However, the steps are the same for all other Office applications. Also remember that if you disable protection, some functions will be affected by malicious bytes, but if you don’t mind, continue and disable Office application protection.

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