How To Fix Microsoft 365 Not Working Issue?


A lot of people use Microsoft 365, which is a set of business apps. But like any software, it can have problems that stop it from working right. This guide will help you figure out what’s wrong with Microsoft 365 and fix it, whether it won’t open, sync, or restart itself often.

Understanding Common Microsoft 365 Issues

Before we get into the solutions, it’s good to know what Microsoft 365 users usually have problems with:

  • Application Won’t Open: This could be because of damaged files, old software, or problems with other programs.
  • Sync Issues: Syncing issues can be caused by a bad network connection, wrong settings, or issues with the Microsoft 365 service.
  • Crashing or Freezing: This can happen because of bugs in the software, not enough system resources, or problems with other programs.
  • Problems with activation: Users sometimes have problems when they try to start their Microsoft 365 subscription.
  • Update Failures: Network problems or clashes with other software can make it impossible to update Microsoft 365.

Fixes for Microsoft 365 Not Working Issue

1. Restart Your Computer and Microsoft 365

A restart is one of the easiest things you can do to fix the problem. This can fix short-term problems and get rid of any small program bugs.

  • Put your work away and close all of your programs.
  • Start up your computer again.
  • Open up Microsoft 365 and see if the problem is still there.

How To Fix Microsoft 365 Not Working Issue?

2. Check Your Internet Connection

A stable internet link is needed for many Microsoft 365 features. Make sure that your internet is working right.

  • To check your link, open your web browser and go to a site.
  • Restarting your router or calling your ISP are two things you can try if you’re having trouble with the internet.

3. Update Microsoft 365

Outdated software can make things not work together properly. Make sure you have the most recent version of Microsoft 365.

  • Start up any Microsoft 365 app, like Word or Excel.
  • Select “File” and then “Account” or “Office Account.”
  • Go to Update Options and then click on Update Now.

4. Repair Microsoft 365

MS 365 comes with a repair tool that can fix a lot of problems.

  • Turn on your Windows PC and open the Control Panel.
  • To get to Programs and Features, go to Programs.
  • Look for Microsoft 365 in the list of apps you have installed.
  • Pick Change after clicking on it.
  • Pick Quick Repair and do what it says. Check out Online Repair if the problem still exists.

How To Fix Microsoft 365 Not Working Issue?

5. Disable Add-Ins

Sometimes, add-ins can make Microsoft 365 apps not work right. Turn them off to see if that fixes the problem.

  • Open the Microsoft 365 app that is broken.
  • Click on File, then Options, and then Add-ins.
  • Click Go after choosing COM Add-ins.
  • Click OK after unchecking all of the add-ins.
  • Start the program up again.

6. Check Your Account Status

Make sure that your Microsoft 365 subscription is still valid and that there are no billing issues.

  • Visit the Microsoft Account site.
  • You need to log in with your Microsoft account.
  • Under Services & subscriptions, you can see how your account is going.

7. Clear Cache and Temporary Files

If your data is damaged, clearing your cache and temporary files can help fix the problem.

  • Find the path C:\Users\[YourUsername]\AppData\Local\Microsoft\Office in File Explorer.
  • Get rid of everything in the Office folder.
  • Start up your computer again and then open Microsoft 365.

How To Fix Microsoft 365 Not Working Issue?

8. Reinstall Microsoft 365

If the problems above don’t get fixed, you might need to restart Microsoft 365.

  • To get to Programs and Features, open the Control Panel and go to it.
  • Look for Microsoft 365 in the list of apps you have installed.
  • Pick Uninstall from the menu that comes up.
  • Just do what it says to do to get rid of Microsoft 365.
  • Get the most recent version from the Microsoft 365 page and install it.

9. Check for Windows Updates

Make sure that your working system is up to date, because Microsoft 365 may need certain updates to work.

  • Click on Update & Security, then click on Windows Update.
  • Click “Check for updates” and then accept any updates that are found.

10. Contact Microsoft Support

If you’ve done all of the above and are still having problems, you may need to get in touch with Microsoft Support for more help.


For many users, Microsoft 365 is an important tool, and having problems with it can be annoying. By following the steps above, you should be able to fix most standard issues. You can fix your internet connection, update the software, or do any of these other troubleshooting steps to get your Microsoft 365 apps working properly again. Remember that if nothing else works, you can always call Microsoft Support for help.

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Frequently Asked Questions (FAQs)

The first question is why Microsoft 365 keeps crashing.

Microsoft 365 could crash because of old software, damaged files, not enough system resources, or problems with other programs. Most of the time, these problems can be fixed by updating and fixing the software.

How do I fix Microsoft 365 sync problems?

If you’re having trouble with sync, check your internet connection, make sure your software is up to date, and make sure your account settings are right. You can also try restarting your device or the app that is giving you trouble.

What should I do if I can’t open Microsoft 365?

If Microsoft 365 won’t open, restart your computer, look for updates, fix the software, and make sure your subscription is still valid. It might also help to turn off any add-ins and delete any temporary files and cache.

How do I fix Microsoft 365?

To fix Microsoft 365, go to Control Panel > Programs > Programs and Features, locate Microsoft 365, click Change, and pick Quick Repair. Just do what it says to finish the fix process.

If I restart Microsoft 365, will I lose my data?

You can reinstall Microsoft 365 and not lose your info. If you remove and restart the software, your files in OneDrive and on your computer will still be there.

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