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Error Code:80029c4a Description:Error loading type library/DLL.

When you try to open QuickBooks, you see this error message:

 

Why this is happening

This error usually occurs when a QuickBooks system file has been damaged or cannot be found. This can sometimes occur when an antivirus has incorrectly marked a QuickBooks system file as being infected with a virus.

On August 15, 2014, Avast! antivirus incorrectly flagged the DMUSERS.DLL QuickBooks file as being infected and qurantined the file. This will cause this error to occur.

How to fix it

Solution 1: Perform an Avast Virus Definition and Program Update:

  1. Right-click on your Avast icon in the icon tray in the lower righthand corner.
  2. Choose Update.
  3. Click Program and follow the prompts to update the Avast program.
  4. Repeat steps 1-3 above and choose Engine and Virus Definitions.

Solution 2: Check your antivirus program for files that have been quarantined.

Click here for steps on checking quarantined files in Avast! antivirus.

For directions for other antivirus programs, please consult your Anti-virus help documentation.

 

Solution 3: Perform a clean install of QuickBooks

 

If these steps do not resolve the issue, you can read discussions and post messages and questions relating to your issue on the Intuit QuickBooks Community site for free or you can contact a technical support agent for additional guidance. Fees may apply.

KB ID# SLN41083
10/24/2014 3:18:28 AM
PPRDQSSWS401 9102 Pro 2013 87b78e