QuickBooks Error 80029c4a ("Can't Load Type Library/DLL")? Skip the Registry Cleaner

Sources linked 1 min read July 1, 2026 · by Ryan Bennett

QuickBooks Desktop errors with 80029c4a: “Can’t load XLCALL32.DLL” / “Error loading type library/DLL.”

Start with targeted repair: 80029c4a can occur when antivirus quarantines a QuickBooks DLL or an installation component is damaged. Check quarantine and use Intuit’s Tool Hub before attempting a full reinstall.

Fix 1: Update to the latest release

Help → Update QuickBooks Desktop → Update Now → tick Reset Update → Get Updates, then restart QuickBooks. A known fix for 80029c4a.

Fix 2: Run Quick Fix my Program (Tool Hub)

Open the QuickBooks Tool Hub → Program Problems → Quick Fix my Program.
If needed, Installation Issues → QuickBooks Install Diagnostic Tool (repairs .NET/MSXML/C++ the DLL depends on).
Reboot and reopen QuickBooks.

Fix 3: Stop antivirus from quarantining QuickBooks files

Security software flagging a QuickBooks DLL is a top 80029c4a cause:

In Windows Security / your AV, restore any quarantined QuickBooks files and exclude the QuickBooks program folder (e.g. C:\Program Files\Intuit) and C:\ProgramData\Intuit.
Reboot and retry.

Fix 4: Repair (not “clean reinstall + registry”) as last resort

If it persists, use Tool Hub → Installation Issues → Clean Install Tool — a guided repair/reinstall. There’s no need to run third-party registry cleaners, which are risky and unnecessary here.

FAQ

Is my company file affected? No — 80029c4a is about loading a program DLL, not your data.

It won’t open at all afterward? See QuickBooks Desktop won’t open for the broader startup-fix order.

Sources: Intuit — Fix Error 80029c4a when opening QuickBooks Desktop