Error 0x8004FC12 when activating Office 2013 or Office 365
First, run the System File Checker.
Use the System File Checker to run the sfc /scannow command to scan all protected system files and replace the incorrect versions with the correct Microsoft versions. Click on your operating system below and follow the steps to run the System File Checker.
For a Windows 7 PC
- Click Start > All Programs > Accessories, and then right-click Command Prompt and choose Run as administrator.
- In the command prompt, type sfc /scannow and press Enter.
- When the system scan is complete, try to install Office again.
For a Windows 8 PC
- Swipe in from the right edge of the screen, and then tap Search. (If you're using a mouse, point to the upper-right corner of the screen, move the mouse pointer down, and then click Search.)
- Enter command prompt in the search box.
- In the list of results, swipe down on or right-click Command Prompt, and then tap or click Run as administrator.
- In the Administrator: Command Prompt window, type sfc /scannow press Enter.
- When the system scan is complete, try to install Office again.
If you ran the System File Checker and you're still having the same problem, you can try performing a Reset or a Reinstall of Windows. You can check out these articles for help: