Repairing Microsoft Office in Windows 10

1. Right-click on the start button Start (bottom left) and select Apps and functions from the pop-up menu.
   
2. Select the Microsoft Office product you want to repair and select Change. Note: The entire Office suite will be repaired, even if only one application, e.g. Word or Excel, is to be repaired. If you have installed a standalone app, you can search for this application by name.
3. Depending on whether your copy of Office is a click-and-go or MSI-based installation, the following options will be displayed for further action. Follow the steps for your installation type.click-and-goInthe How do you want to repair your Office programs? window, select the Online repair > Repair option to ensure that everything is repaired. (The Quick Repair option is also available, which is faster, but only detects and then replaces corrupted files.)MSI-basedIn Change installation, select Repair, and then click Next.
4. Follow the instructions on the screen to carry out the repair.

Carrying out the repair did not help. What happens now?

If running a repair does not resolve the issue, use this tool to completely uninstall and then reinstall Office.

1. Click on the button below to download and install the support tool for Office uninstallation.
2. Follow the steps below to download the uninstall support tool for your browser.
3. Complete the remaining screens and restart your computer when prompted; after restarting your computer, the uninstall tool will automatically reopen to perform the final step of the uninstall process. Follow the remaining instructions.
4. Select the steps for the version of Office you want to install or reinstall. Close the tool for uninstallation.

Source: https://support.microsoft.com/de-de/office/reparieren-einer-office-anwendung-7821d4b6-7c1d-4205-aa0e-a6b40c5bb88b?ui=de-de&rs=de-de&ad=de

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