NoBootJs Error - Outlook Web App Fails to Load JavaScript on Laptop Only

Question

Problem Description:

I am experiencing a critical issue accessing Outlook.com on my laptop that has persisted for multiple days. The same account works perfectly on my mobile phone, confirming this is device-specific.

Error Details:

• Error Code: NoBootJs
• Client IP: [Moderator note: personal info removed]
• Client ID: [Moderator note: personal info removed]
• Error Source: NoBootJs
• Previous Error: SwitchMailFolder_00_0010 with CDN errors and ChunkLoadError for multiple JavaScript files (owa.50522.m, owa.44636.m, etc.)

Symptoms:

• Outlook.com fails to load in ALL browsers on laptop (Edge, Chrome, Firefox tested)
• Windows Mail app also fails
• Phone access works fine on same network
• After resetting site permissions, I can briefly access the account but functionality is limited, then error returns immediately

Troubleshooting Already Completed:

• Cleared browser cache and cookies (all browsers)
• Hard refresh (Ctrl+F5, Ctrl+Shift+R)
• Disabled all browser extensions and ad blockers
• Checked JavaScript enabled in all browsers
• Flushed DNS and reset network stack (ipconfig /flushdns, netsh winsock reset)
• Changed DNS to 8.8.8.8 and 1.1.1.1
• Repaired Microsoft Visual C++ Redistributable
• Checked Windows Script Host is enabled
• Ran sfc /scannow and DISM commands
• Reset Windows Mail app
• Deleted local cache folders (%localappdata%\Microsoft\Olk and OneAuth)
• Tried InPrivate/Incognito mode
• Verified no VPN or proxy interference

Request: Please investigate why JavaScript files fail to load from Microsoft's CDN specifically on this device, and provide a fix or remote assistance.

Answer 1

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Hi Walid Mensi

After reviewing all the information provided, I think the following information might help:

In overall, the NoBootJs error indicates that Outlook Web App (OWA) failed to download the JavaScript bootstrap files it requires to initialise. The ChunkLoadError messages for files such as owa.50522.m point to a failure fetching static assets from Microsoft's CDN (res.cdn.office.net). Moreover, the service workers survive standard browser cache clears, which explains why conventional cache-clearing steps have not resolved the issue.

Given this, you can try the steps below to see if it can help you:

1. Unregister Service Workers and Clear IndexedDB

• Edge: Navigate to edge://serviceworker-internals/ and find any outlook.com or office.com entries, click Unregister.
• Chrome: Navigate to chrome://serviceworker-internals/ — same steps.

Then clear IndexedDB: F12 --> Application --> Storage --> select outlook.live.com -->Clear site data.

Reference: Service Worker API — MDN Web Docs

Note: This information is provided as a convenience to you. These sites are not controlled by Microsoft, and Microsoft cannot make any representations regarding the quality, safety, or suitability of any software or information found there. Please ensure that you fully understand the risks before using any suggestions from the above link.

2. Test with a fresh Windows User Profile

Create a new local account (Settings --> Accounts --> Add someone else to this PC) and test Outlook.com from it. If it works, the issue is confined to your current user profile's stored data.

Reference: Create a local user account in Windows — Microsoft Support

3. Fully disable security software and test

Some endpoint protection products inspect HTTPS traffic at the OS level and can silently corrupt CDN responses. Fully exit your antivirus from the system tray and test. If Outlook.com loads, add *.cdn.office.net and *.live.com to the HTTPS inspection exclusions.

4. Clear Windows SSL state and certificate cache

Run inetcpl.cpl --> Content tab --> Clear SSL State. Then in an elevated PowerShell:

Stop-Service -Name "CryptSvc" -Force
Remove-Item "$env:SystemRoot\System32\catroot2" -Recurse -Force -ErrorAction SilentlyContinue
Start-Service -Name "CryptSvc"

If none of the above resolves the issue, I recommend you can reach out to Microsoft Support via LINK referencing Client ID and error source NoBootJs, as these identifiers allow Microsoft to retrieve server-side diagnostic logs for your specific session.

Hope my answer will help you.

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Answer 2

I think that on one laptop NoBootJs usually comes from the user‑level tls store choking the cdn js, so just open OWA → F12 → “disable cache” → hard reload, then sign in once from a clean Windows profile so the stuck keys can’t follow u.

and to avoid the next bump… hit “Clear SSL state” after it loads — tiny step, but it stops the cert drift that often shows up right after.