Word freezes or becomes unresponsive when you scroll through the Comments pane on the right side of the document window. This problem typically occurs in documents with many comments, tracked changes, or complex formatting elements like embedded images and tables. The freeze is caused by a conflict between the graphics rendering engine and the real-time comment loading process in Word. This article explains why the Comments pane causes freezing and provides three proven fixes to restore smooth scrolling.
Key Takeaways: Stop Word Freezing in the Comments Pane
- File > Options > Advanced > Show document content > Disable hardware graphics acceleration: Turns off GPU rendering that conflicts with the Comments pane scrolling.
- Ctrl+Alt+Z to toggle Comments pane off and on: Quickly reloads the pane without restarting Word when a freeze starts.
- File > Options > Trust Center > Trust Center Settings > Protected View > Uncheck “Enable Protected View for files originating from the internet”: Stops Word from re-scanning comments for security every time you scroll.
Why Scrolling the Comments Pane Freezes Word
The Comments pane in Word is a live interface element that loads and renders each comment thread, including reviewer names, timestamps, and reply threads, as you scroll. When the document contains a large number of comments — typically more than 50 — Word must redraw the pane content on every scroll action. On systems with older or integrated graphics hardware, the GPU acceleration that Word uses to render the document canvas conflicts with the pane rendering process. This conflict causes the application to hang for several seconds or indefinitely until the rendering queue clears.
Documents with tracked changes compound the problem. Each comment is linked to a specific revision mark or insertion point. When you scroll the Comments pane, Word also attempts to highlight the corresponding location in the document body. This two-way synchronization places additional load on the main thread, which is shared by all UI rendering tasks. If the document also contains large images, embedded objects, or complex tables, the thread saturates and Word stops responding.
Hardware Graphics Acceleration Role
Hardware graphics acceleration offloads rendering tasks to the GPU. In Word, this feature speeds up document scrolling and zooming. However, the Comments pane is rendered differently — it uses a separate software-based rendering pipeline. When acceleration is enabled, Word tries to merge these two pipelines. The merge fails on systems where the GPU driver does not support the required DirectX features, causing the freeze.
Protected View Interference
Protected View is a security sandbox that opens documents from untrusted sources in read-only mode. When you enable editing on such a document, Word re-scans every comment and tracked change for macros or active content. If the document has hundreds of comments, this scan runs each time the Comments pane is scrolled to a new comment group, creating a freeze cycle.
Steps to Fix Word Freezing When Scrolling Comments Pane
Apply the fixes in the order listed below. Test scrolling the Comments pane after each fix to confirm the freeze is resolved.
Fix 1: Disable Hardware Graphics Acceleration
- Open Word Options
Click File in the top-left corner, then click Options at the bottom of the left navigation pane. - Navigate to the Advanced tab
In the Word Options dialog, click Advanced in the left sidebar. - Scroll to the Show document content section
Scroll down until you see the heading Show document content. This section is about halfway down the Advanced options list. - Check the disable graphics acceleration box
Locate the checkbox labeled Disable hardware graphics acceleration. Click the box to place a checkmark in it. - Apply and restart Word
Click OK to close the dialog. Close Word completely and reopen the document. Test scrolling the Comments pane.
Fix 2: Turn Off Protected View for Internet Files
- Open Trust Center Settings
Click File > Options > Trust Center in the left sidebar, then click the Trust Center Settings button. - Select Protected View
In the Trust Center dialog, click Protected View in the left navigation pane. - Uncheck the internet files option
Uncheck the box labeled Enable Protected View for files originating from the internet. Leave the other two Protected View options checked unless you also work with files from OneDrive or SharePoint that show the same freeze. - Confirm and restart
Click OK twice to close both dialogs. Restart Word and open the document. Test scrolling the Comments pane.
Security note: Disabling Protected View for internet files reduces security. Only apply this fix if the document comes from a trusted source such as your corporate SharePoint or a known colleague. After finishing work on the document, re-enable Protected View.
Fix 3: Reset the Comments Pane via Keyboard Shortcut
- Close the Comments pane
Press Ctrl+Alt+Z once to close the Comments pane. The pane slides to the right and disappears. - Reopen the Comments pane
Press Ctrl+Alt+Z again to reopen the pane. Word reloads all comments from the document’s comment store, clearing any stuck rendering state. - Test scrolling
Scroll through the pane using the mouse wheel or the up/down arrow keys. If the freeze does not recur, the issue was a temporary rendering blockage.
This fix is a temporary workaround. If the freeze returns after a few minutes, apply Fix 1 permanently.
If Word Still Has Issues After the Main Fix
Word Freezes When Scrolling Comments Pane After Adding a New Comment
This symptom indicates a corrupt comment thread in the document. Open the document in Word Online by clicking File > Save As > OneDrive and then opening the file in a browser. In Word Online, delete the most recently added comment. Save the file, reopen it in the desktop app, and test the pane. Word Online uses a different rendering engine that bypasses the GPU conflict.
Word Freezes When Scrolling Comments Pane in a Document With Tracked Changes
When comments are linked to tracked changes, Word tries to highlight both the change and the comment simultaneously. Accept or reject all tracked changes before working with comments. Click Review > Accept > Accept All Changes or Reject All Changes. After the changes are resolved, the Comments pane no longer needs to sync with revision marks, reducing the rendering load.
Word Freezes When Scrolling Comments Pane After Windows Update
A Windows Update that replaces the GPU driver can reintroduce the hardware acceleration conflict. Run the graphics driver update tool from your PC manufacturer (Dell, HP, Lenovo) or download the latest driver from Intel, AMD, or NVIDIA. After updating the driver, restart the computer and test Word again. If the freeze persists, reapply Fix 1.
Comparison of Methods to Fix Comments Pane Freeze
| Method | Permanent Fix | Ease of Use |
|---|---|---|
| Disable hardware graphics acceleration | Yes | Simple — one checkbox in Options |
| Turn off Protected View for internet files | Yes | Moderate — requires Trust Center navigation |
| Reset Comments pane with Ctrl+Alt+Z | No — temporary workaround | Instant — two keystrokes |
| Accept all tracked changes before scrolling | Yes for change-linked comments | Moderate — requires Review tab actions |
Word Freezes When Scrolling Comments Pane: Fix — You can now resolve the freeze by disabling hardware graphics acceleration at File > Options > Advanced or by resetting the pane with Ctrl+Alt+Z. Test the Comments pane immediately after applying each fix. For documents with more than 100 comments, keep hardware acceleration disabled permanently to prevent recurrence. As an advanced step, run the Word Safe Mode by holding Ctrl while launching Word — if the freeze does not occur in Safe Mode, a third-party add-in is the cause, and you should disable add-ins one by one in File > Options > Add-ins.