Office Performance Issues

How to Fix Microsoft 365 Performance Issues When Running CapCut

Khadija Khan Sep 25, 2026 868 views

Question details

The user is experiencing significant slowdowns, freezing, or crashing in Microsoft 365 applications when running video editing software like CapCut.

Does CapCut Affect Microsoft 365 Performance?

Product: Microsoft 365
Device & OS: not provided
Scenario: Editing documents in Word or Excel while simultaneously rendering videos or running CapCut in the background.
Observed behavior: Microsoft 365 applications become sluggish, freeze, or crash entirely due to intense CPU, GPU, memory, and disk resource consumption by the video editor.

Before you start

Save all your active work in Microsoft Word or Excel before managing system resources to prevent accidental data loss if an application gets forced to close.

Solution 1Recommended

Monitor and Manage System Resources

Use your system's built-in monitoring tools to identify and reduce high resource consumption, freeing up CPU and RAM for Microsoft 365.

Heavy applications like CapCut compete directly with Microsoft 365 for system resources. By closing unnecessary background tasks, you can stabilize Word and Excel.

Open Task Manager or Activity Monitor

On Windows, press Ctrl + Shift + Esc to open Task Manager. On Mac, open Spotlight Search and type Activity Monitor.

Identify Heavy Resource Consumers

Sort the active processes by clicking on the CPU or Memory column headers to see how much of your system is being utilized by CapCut or an emulator.

End Unnecessary Background Tasks

Right-click on any non-essential background applications that are consuming high resources and select 'End task' or 'Force Quit'.

Check Hardware Specifications: If you frequently run heavy applications simultaneously, upgrading your system's RAM or CPU can permanently resolve multitasking bottlenecks.

Solution 2

Reduce CapCut Processing Workload

Lowering the processing demand of your video editor prevents it from starving Microsoft 365 of essential system resources.

Free Microsoft Office alternative

Switch to a Lightweight Office Suite for Better Performance

If Microsoft 365 constantly lags or crashes when you run heavy applications like CapCut, consider switching to WPS Office. It is designed to consume significantly fewer system resources, ensuring smooth document editing even while you multitask.

1. Download and Install: Get the free WPS Office installer from the official website and install it on your computer.
2. Open Your Files: Launch WPS Office and directly open your existing Microsoft Word or Excel documents without losing formatting.
3. Multitask Smoothly: Run your heavy applications like CapCut in the background while enjoying a lag-free document editing experience.

Lightweight architecture that consumes minimal CPU and RAM.Fully compatible with Microsoft Word, Excel, and PowerPoint formats (.docx, .xlsx, .pptx).Allows for seamless multitasking alongside heavy video editing applications.Free to use with a familiar, easy-to-navigate user interface.

microsoft office alternative - wps office

Frequently Asked Questions

Why does Excel freeze specifically when I export videos?

Exporting a video utilizes maximum CPU and GPU power to encode the media. This leaves almost no processing overhead for Excel, causing it to freeze or become unresponsive until the export is finished.

Will adding more RAM stop Microsoft 365 from lagging?

Yes, upgrading your system's memory (RAM) is one of the most effective ways to allow resource-heavy applications like CapCut and Microsoft 365 to run simultaneously without system bottlenecking.

Is it better to run the web version of Microsoft 365 while using CapCut?

Using the web version might help slightly as it relies on your browser's resource allocation, but modern browsers can also be highly memory-intensive. It is still recommended to pause video rendering when working on complex documents.

Does using CapCut via an emulator use more resources than the native desktop app?

Yes, running an Android emulator adds significant virtual machine overhead. It drastically increases CPU, memory, and disk usage compared to running a native desktop application, leading to a higher chance of Microsoft 365 crashing.

Office App Problems