Microsoft 365 Error Codes

How to Fix Microsoft 365 Errors 0x2-0x0 and 0x5-0x0

Partner Editor Oct 10, 2026 869 views

Question details

Users are unable to open Microsoft 365 applications due to recurring errors 0x2-0x0 in Outlook and 0x5-0x0 in Word/Excel, with standard repairs failing to provide a permanent fix.

How to Fix Microsoft 365 Errors 0x2-0x0 and 0x5-0x0

Product: Microsoft 365
Device & OS: Windows 10
Scenario: Launching Microsoft Office applications in an environment secured by strict endpoint protection software.
Observed behavior: Outlook displays error 0x2-0x0 and Word or Excel displays error 0x5-0x0 upon launch. Reinstalling or repairing Office only resolves the issue temporarily before the errors return.

Before you start

Verify your active antivirus or endpoint protection software, as resolving this issue usually requires administrative privileges to modify security policies.

Solution 1Recommended

Configure Exclusions in Cisco AMP Secure Endpoint

Use this solution to permanently stop endpoint protection software from blocking Microsoft Office executables, which is the primary cause of these errors.

Errors 0x2-0x0 and 0x5-0x0 are frequently caused by strict security software, such as Cisco AMP Secure Endpoint, incorrectly flagging or blocking Microsoft 365 processes.

Because repairing or reinstalling Office only replaces the files temporarily before the security software quarantines or blocks them again, you must add proper directory exclusions to fix the root cause.

Identify your security software

Check your system tray or Windows Security settings to confirm if Cisco AMP Secure Endpoint or another enterprise-grade antivirus is actively running on your Windows 10 device.

Contact your security administrator

If you are on a company network, reach out to your IT department. Changing endpoint protection policies typically requires administrative credentials.

Add Microsoft 365 exclusions

In the Cisco AMP console, navigate to the exclusion policies and add the main Microsoft Office installation paths (e.g., C:\Program Files\Microsoft Office\root\Office16) and relevant executables (WINWORD.EXE, EXCEL.EXE, OUTLOOK.EXE).

Restart and verify

Restart your computer to ensure the new security policies take effect, then attempt to launch Outlook, Word, or Excel to verify the errors are resolved.

Configure Exclusions in Cisco AMP Secure Endpoint

Security Policy Note: Always ensure you are following your organization's security guidelines when modifying exclusion lists to avoid exposing your system to vulnerabilities.

Solution 2

Perform an Online Repair of Microsoft 365

If you have already added the necessary antivirus exclusions but the applications still fail to launch, use this method to repair corrupted Office files.

Free Microsoft Office alternative

Try WPS Office for a Hassle-Free Experience

If you are tired of dealing with complex installation errors and endpoint security conflicts in Microsoft 365, WPS Office is a highly compatible, lightweight, and free alternative that installs quickly and seamlessly.

1. Download the software: Visit the official WPS Office website and click the free download button to get the lightweight installer.
2. Install WPS Office: Run the installer and follow the simple on-screen instructions. The installation takes only a few moments.
3. Open your files instantly: Launch WPS Office and directly open your existing Word, Excel, and PowerPoint documents without worrying about 0x2-0x0 or 0x5-0x0 errors.

Fully compatible with Microsoft Office formats including DOCX, XLSX, and PPTX.Lightweight architecture that avoids complex registry hooks and minimizes antivirus conflicts.Free to use with a familiar, easy-to-navigate user interface.All-in-one suite combining Writer, Spreadsheet, Presentation, and PDF tools.

microsoft office alternative - wps office

Frequently Asked Questions

Why do errors 0x2-0x0 and 0x5-0x0 keep returning after I reinstall Office?

Reinstalling only provides a temporary fix because the root cause is typically a third-party security program, like Cisco AMP, blocking the newly installed files shortly after they are placed on your system.

Can I fix these errors without administrative privileges?

Usually, no. Because the fix requires modifying enterprise-level endpoint security policies to add exclusions, you will need assistance from your IT or security administrator.

What if I do not use Cisco AMP but still get this error?

Other aggressive antivirus or endpoint protection software can cause the exact same issue. Check your specific antivirus quarantine logs or block history to see if it is intercepting Office executables, and add exclusions accordingly.

Does creating a new local user profile fix error 0x2-0x0?

While creating a new profile might temporarily bypass corrupted user settings, it is generally impractical for enterprise environments and does not resolve underlying system-wide antivirus blocks.

Microsoft Office Error Codes