Office Apps Crashing

How to Fix Excel Crashing Randomly in Microsoft 365

Adam DavisAdam Davis Oct 28, 2026 869 views

Question details

Users need troubleshooting steps to resolve an issue where Microsoft Excel for Microsoft 365 crashes randomly, despite having already tried basic fixes like reinstalling Office and updating Windows.

How to Fix Excel Crashing Randomly in Microsoft 365
Product
Microsoft Excel for Microsoft 365
Device & OS
Windows
Scenario
Working with workbooks or leaving Excel running in the background.
Observed behavior
The Excel application randomly crashes or closes unexpectedly for certain users without a specific trigger or error message.
Before you start

Ensure you have saved all open work and verify that you have Windows administrator privileges, as you will need them to modify system configurations and create new user profiles.

Solution 1Recommended

Perform a Windows Clean Boot

A clean boot starts Windows with a minimal set of drivers and startup programs to help identify if a background service is causing Excel to crash.

Since standard Office repairs and reinstallations have not resolved the random crashes, a third-party application or a background Windows service may be conflicting with Excel.

Performing a clean boot safely disables these non-essential services so you can isolate the root cause.

1
Open System Configuration

Press the Windows key + R to open the Run dialog, type 'msconfig', and press Enter to open the System Configuration utility.

2
Disable Third-Party Services

Navigate to the 'Services' tab, check the box for 'Hide all Microsoft services' at the bottom, and then click the 'Disable all' button.

3
Disable Startup Items

Switch to the 'Startup' tab and click 'Open Task Manager'. In Task Manager, right-click each enabled startup item and select 'Disable'.

4
Restart Your Computer

Close Task Manager, click 'OK' on the System Configuration window, and restart your computer. Open Excel to see if the random crashes still occur.

Re-enabling Services: If Excel stops crashing after a clean boot, you can gradually re-enable services one by one to pinpoint exactly which software is causing the conflict.
Free Microsoft Office alternative

Switch to WPS Office for a Stable, Crash-Free Experience

If Microsoft Excel continues to crash and disrupt your workflow despite advanced troubleshooting, consider switching to WPS Office. It is a highly stable, lightweight, and free alternative that offers seamless compatibility with your existing Excel spreadsheets, ensuring you can keep working without interruption.

  1. 1. Download WPS Office: Visit the official WPS website and download the free installation package for your Windows PC.
  2. 2. Install the Software: Run the lightweight installer. The process takes only a few minutes and will not conflict with existing software.
  3. 3. Open Your Spreadsheets: Launch WPS Spreadsheet and easily open your existing .xlsx files to continue your work without random crashes.
Fully compatible with Microsoft Excel (.xlsx, .xls) and CSV formatsHighly stable application architecture that reduces the risk of random crashesLightweight installation that consumes less system memory and CPUFree to use with a familiar, intuitive user interfaceSeamless migration with no need for complex admin configurations
microsoft office alternative - wps office

Frequently Asked Questions

Why does Excel continue to crash even after I have reinstalled it?

Reinstalling Excel often leaves behind user-specific settings, corrupted registry keys, and add-ins. If the root cause is a corrupted Windows user profile, a conflicting background service, or a damaged system file, a simple reinstallation will not fix the random crashes.

Will performing a Windows clean boot delete my files or data?

No, a clean boot does not delete any of your personal files, documents, or applications. It simply restarts your computer with only essential Microsoft services running to help you identify if a third-party app is causing conflicts.

How can I check if a specific Excel add-in is causing the application to crash?

You can check for problematic add-ins by starting Excel in Safe Mode. Press and hold the 'Ctrl' key while clicking the Excel shortcut, and confirm you want to start in Safe Mode. If Excel runs stably, an add-in is likely the culprit. You can then disable add-ins one by one via File > Options > Add-ins to find the exact cause.

What information should I provide when opening a Microsoft 365 support ticket?

When opening a ticket, specify that you have already tried updating Windows, reinstalling Office, performing a clean boot, and creating a new user profile. Also, provide a screenshot of the File > Account page in Excel and clearly mention if the crash happens during a specific action or randomly.