How do I fix "msosync.dll is missing" error?

This file is typically included with the game or Steam. Try verifying game files in Steam (right-click game > Properties > Local Files > Verify integrity) or reinstall the game.

Is it safe to download msosync.dll?

Yes, when downloaded from official sources. We recommend installing the official Microsoft Office package instead of downloading individual DLL files. This ensures you get a digitally signed, verified file directly from Microsoft.

Where should I put msosync.dll?

For 64-bit applications, place in C:\Windows\System32. For 32-bit applications on 64-bit Windows, place in C:\Windows\SysWOW64. However, we strongly recommend using the official installer instead of manual placement.

Gaming Version 1.0.0.0

Fix msosync.dll Missing Error

Scanned: 2025-11-30

MD5 Verified

0.2M+ downloads

⚡ Quick Fix: Install Microsoft Office

This is the recommended fix from Microsoft. It will restore msosync.dll and all related runtime files automatically.

Download Official Package From Microsoft.com

Common Error Messages

✗ msosync.dll is missing

✗ Application failed to start: msosync.dll not found

What is msosync.dll?

MSOSYNC.dll is a component of Microsoft Office.

How to Fix "msosync.dll is missing" Error

1 Method 1: Run System File Checker

sfc /scannow

Open Command Prompt as Administrator and run this command. It will scan and repair corrupted system files.

2 Method 2: DISM Repair

DISM /Online /Cleanup-Image /RestoreHealth

If SFC doesn't work, run this command to repair the Windows image.

Manual Download (Last Resort)

⚠️ Important Warning

Downloading individual DLL files is not recommended. We strongly advise using the official runtime package above. Only use manual download if the official method fails.

If you must manually place the file:
• 64-bit apps: C:\Windows\System32
• 32-bit apps on 64-bit Windows: C:\Windows\SysWOW64