Office Compatibility Issues

How to Fix Access MouseWheel Event Returns Count Zero Bug

Maira Mehtab Sep 22, 2026 869 views

Question details

Users need to resolve an issue in Microsoft Access where the MouseWheel event's Count parameter fails to register backward movement.

Product: Microsoft Access
Device & OS: not provided
Scenario: Scrolling or navigating through records using the mouse wheel within Microsoft Access forms.
Observed behavior: The MouseWheel event's Count parameter always returns zero, causing backward navigation to fail completely.

Before you start

Check your current Microsoft 365 build version by opening Access, navigating to File > Account, and reviewing the version number under the 'About Access' section to confirm if you are on the affected version 2412.

Solution 1Recommended

Update Microsoft 365 to Version 2501

Install the official fix released by the Microsoft Access team in the Current Channel update.

Microsoft has officially recognized this bug and released a patch. Updating to Current Channel version 2501 (build 18429.20132) or Current Channel Preview version 2501 (build 18429.20114) will permanently resolve the MouseWheel Count parameter issue.

Open Account Settings

Launch Microsoft Access, click on 'File' in the top-left corner, and select 'Account' from the sidebar menu.

Check for Updates

Under the Product Information section, click on the 'Update Options' dropdown button and select 'Update Now'.

Apply and Restart

Wait for Office to download and apply the latest updates. Once completed, restart Microsoft Access and verify that your build number is 18429.20114 or higher.

Update Availability: If the update is not yet available in your specific update channel, you may need to wait a few days or use the rollback method temporarily.

Solution 2

Roll Back to an Earlier Stable Build

Revert your Office installation to a previous version as a temporary workaround until the fix reaches your update channel.

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Frequently Asked Questions

Which specific versions of Microsoft Access are affected by this MouseWheel bug?

This bug specifically affects Microsoft 365 Access version 2412, where the MouseWheel event fails to track backward scrolling correctly.

What is the exact build number that contains the official fix?

The fix is successfully implemented in the Current Channel version 2501 (build 18429.20132) and the Current Channel Preview version 2501 (build 18429.20114).

Will rolling back my Microsoft 365 installation affect my database data?

No, rolling back the Office installation only changes the application software version. It will not delete, modify, or corrupt your Access databases (.accdb) or other personal files.

Can I use WPS Office to open Microsoft Access (.accdb) files?

No, WPS Office provides excellent comprehensive alternatives for Word, Excel, and PowerPoint, but it does not currently include a relational database management program to open .accdb or .mdb files.

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