How to Fix High CPU Usage and Lag When Scrolling in Excel
Question details
The user experiences severe lag, freezing, and abnormally high CPU usage when scrolling through Excel worksheets, even on simple or small files.
- Product
- Microsoft Excel
- Device & OS
- Windows
- Scenario
- Scrolling through data or navigating worksheets in Excel.
- Observed behavior
- Excel uses excessive CPU power, causing noticeable lag and freezes while scrolling, even in unformatted 30KB files with no add-ins.
Ensure your computer meets the system requirements for your version of Microsoft Office and temporarily disable any third-party Excel add-ins to rule out compatibility conflicts.
Install the Latest Office Updates
Applying the latest updates can resolve known system bugs that cause excessive CPU usage and scrolling lag in Excel.
Minor pauses can occasionally occur while Excel redraws a worksheet, but severe lag and sustained high CPU usage are often signs of a software bug. Installing the most recent Office patches ensures you have the latest performance fixes.
Launch Microsoft Excel, create or open a blank workbook, and click on 'File' in the top-left corner. Select 'Account' from the left sidebar.
Under the Product Information section, click on the 'Update Options' drop-down button.
Select 'Update Now'. Allow Microsoft Office to download and install any pending updates, then restart Excel to see if the scrolling lag is resolved.
Run a Microsoft Office Online Repair
If updating doesn't work, repairing the Office installation can fix corrupted core files that might be causing severe performance issues.
Experience Smooth Scrolling with WPS Office
If Microsoft Excel continues to lag and drain your CPU, consider switching to WPS Office. It is a highly optimized, lightweight alternative that handles both large datasets and simple spreadsheets flawlessly without system freezes.
- 1. Download and Install WPS Office: Visit the official WPS website to download the free installation package and install the software on your computer.
- 2. Open Your Spreadsheet: Launch WPS Spreadsheets, click on 'File' > 'Open', and select the Excel file that was causing lag.
- 3. Enjoy Smooth Scrolling: Scroll through your data seamlessly without experiencing the high CPU usage or freezes associated with Microsoft Office.
Frequently Asked Questions
Why does Excel lag when I scroll through simple files?
Excel may lag due to outdated software versions, corrupted installation files, or conflicting background add-ins. Even small, simple files can trigger high CPU usage if the core application has a bug that requires an update or repair.
Can conditional formatting cause scrolling lag in Excel?
Yes, excessive, overlapping, or broken conditional formatting rules—especially those applied to entire columns—can heavily impact CPU usage when scrolling. You can clear unused rules by navigating to 'Home' > 'Conditional Formatting' > 'Clear Rules'.
Will hardware graphics acceleration help with Excel freezes?
Sometimes toggling hardware graphics acceleration can improve performance. Go to File > Options > Advanced, scroll down to the Display section, and check or uncheck 'Disable hardware graphics acceleration' to see if it fixes the scrolling lag.
What should I do if the online repair fails to fix the lag?
If the online repair does not resolve the CPU usage issue, you may need to completely uninstall Microsoft Office using the official Microsoft Support and Recovery Assistant tool, and then perform a clean reinstall.
