Immediate Fix: Force Repair the Document
If Microsoft Word crashes instantly when you toggle Track Changes or scroll through redlines, the document’s internal XML mapping is likely corrupted. The fastest way to resolve this is using the “Open and Repair” feature.
Close Microsoft Word completely. Open a blank Word instance. Go to File > Open > Browse. Select the problematic file, but do not click Open yet. Instead, click the small arrow next to the Open button and select Open and Repair.
If the application crashes before you can even select the menu, try launching Word in Safe Mode to bypass conflicting add-ins or corrupt templates. Use the following command in the Run dialog (Win + R):
winword /safeThe “Accept All” Workaround
If the file opens but crashes the moment you touch a track change, try accepting all changes to purge the corrupted metadata. Go to the Review tab, click the arrow under Accept, and select Accept All Changes and Stop Tracking. Save the file under a new name immediately.
Technical Explanation
Word crashes during Track Changes because the software must manage a complex “overlay” of two different document states simultaneously. This process relies heavily on the settings.xml and document.xml.rels files hidden within the .docx compressed package.
When multiple authors edit a document, or when content is pasted from external sources like web pages, non-standard XML tags can be introduced. When you enable Track Changes, Word attempts to index these tags for versioning. If it encounters a “Circular Reference” in the XML or a broken pointer to a comment, the memory heap overflows, causing the software to crash to the desktop.
Additionally, hardware acceleration can sometimes conflict with the rendering of redline strikethroughs and underline formatting, leading to a GPU-related hang.
Alternative Methods
If the immediate repair does not work, the issue may reside in your global template (Normal.dotm) or your Office installation rather than the specific document.
Clear the Word Registry Subkey
Resetting the Word Data options in the Windows Registry can often stop recurring crashes. This forces Word to rebuild its default configuration upon the next launch.
reg delete "HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Word\Data" /fComparison of Recovery Methods
| Method | Best For | Risk Level |
|---|---|---|
| Open and Repair | Corrupt XML tags within a specific file. | Low (Safe) |
| Safe Mode (/safe) | Identifying conflicts with 3rd party Add-ins. | Low (Safe) |
| Registry Reset | Persistent crashes across all documents. | Moderate (Backup first) |
| RTF Round-tripping | Deep-seated document corruption. | Moderate (Lose formatting) |
Finally, ensure that “Hardware Graphics Acceleration” is disabled under File > Options > Advanced > Display. This simple toggle often stops crashes related to the visual rendering of Track Changes on high-resolution displays.