How to Fix STATUS_STACK_OVERFLOW in Outlook?

The STATUS_STACK_OVERFLOW error typically appears in Outlook Webmail when users try to log in or load their inbox. It occurs when the browser’s stack memory exceeds its allocated limit. This issue is most commonly reported on older, unsupported versions of Windows, such as 7, 8, and 8.1, particularly when using Microsoft Edge or Google Chrome—especially after updates to Chromium version 124.x, which introduced stability problems that led to frequent tab crashes and STATUS_STACK_OVERFLOW errors.

Additionally, the error may be triggered by problematic browser extensions—such as ad blockers or productivity toolbars—that interfere with Outlook Webmail’s scripts. The fixes below address browser crashes, conflicting extensions, and OS compatibility issues that trigger this error.

1. Clear Auth Tokens & Cache

Corrupted authentication cookies or cached login tokens can cause login loops or script errors in Outlook Web. Clearing these forces a fresh session and removes conflicts caused by outdated or invalid tokens.

1. Open Chrome or Edge.
2. In the address bar, type https://outlook.office.com and press Enter to open Outlook Web.
3. Press F12 or Ctrl+Shift+I to open Developer Tools.
4. Click the double arrow ( » ) icon at the top right of the Developer Tools bar to expand hidden tabs, then select Application.
5. In the left sidebar under Storage, expand Cookies and click on https://outlook.office.com.
6. In the cookie table that appears, right-click anywhere and select Clear to delete stored login data for Outlook.
   
7. Close the Developer Tools window.
8. (If you’re still signed in) Log out of Outlook Web manually.
9. Press Ctrl+Shift+Delete to open the ‘Clear Browsing Data’ menu.
10. Set the time range to All time.
11. Check the boxes for Cookies and other site data and Cached images and files, then click Clear data.
    
12. Close all browser tabs and restart your browser.

2. Update or Reinstall Browser

Updating or reinstalling Chrome or Edge can fix the STATUS_STACK_OVERFLOW error by resolving memory handling issues in the browser’s JavaScript engine (V8). Updates often patch performance bugs and improve how web applications like Outlook load dynamic content. Reinstalling the browser removes corrupted files, cache, or broken configurations that may be interfering with Outlook Web’s scripts.

Note: If you’re reinstalling, make sure to sign into your browser account to back up bookmarks, saved passwords, and extensions.

Update Browser

1. Open Chrome or Edge.
2. Click the menu button (three horizontal dots) in the top-right corner.
   
3. Go to Help → About Google Chrome / Microsoft Edge.
   
4. The browser will check for updates. If available, install them.
   

Reinstall Browser

1. Press the Windows key, type “Add or Remove Programs”, and press Enter.
   
2. Find your browser (Chrome or Edge), click on it, and select Uninstall.
   
3. Open another browser (like Edge if you uninstalled Chrome) or use the Microsoft Store for Edge.
4. Visit the official download page:
   Google Chrome or Microsoft Edge
5. The website will auto-detect your OS. Click download and run the installer.
   

3. Use a Non-Chromium Browser

Outlook Web uses complex scripts to update emails and content in real-time, which can overload Chrome or Edge and cause the stack overflow error. Switching to a non-Chromium browser like Firefox—or a Firefox-based browser such as Waterfox or LibreWolf—can help resolve Outlook Web crashes, as their JavaScript engine (SpiderMonkey) may handle certain Outlook operations more reliably than Chrome/Edge’s V8 engine on older systems.

1. Open your current browser.
2. Search for Mozilla Firefox in the search bar.
3. Open the Official Mozilla Firefox website and click the download button.
4. Click the download button; it will auto-detect your operating system.
5. After installation, open Outlook Web in Firefox and check for any web crashes.

4. Upgrade Your Operating System

As mentioned above, STATUS_STACK_OVERFLOW errors in Outlook Web can occur more frequently on older versions of Windows like 7 or 8.1 due to outdated memory management systems and lack of modern Chromium support. Upgrading to a newer operating system (such as Windows 10 or 11) improves how memory is allocated for modern JavaScript-based applications, especially those handling dynamic or large mailbox content in Outlook Web.

1. Back up all important files and settings before starting. Make sure you have a valid Windows license key.
2. Open your current browser.
3. Go to the official Microsoft Windows Download page.
   
4. Select your Windows edition (Windows 10 or 11) and click Download Now to get the ISO file.
   
5. Download Rufus, a tool used to create bootable USB drives.
6. Insert a USB with at least 8GB of free space and open Rufus.
   
7. Select the downloaded ISO file in Rufus, choose the USB drive, and click Start to begin creating a bootable Windows disk.
8. Once done, restart your PC.
9. While your system restarts, press the required boot key (usually F12, F2, ESC, or DEL depending on your motherboard) to open the boot menu.
10. Select the bootable USB drive from the list.
11. Once the Windows installer loads, follow the on-screen instructions to complete the installation. Make sure to choose x64 architecture when prompted.