Fix QuickBooks Desktop Error 3371: License Properties Reset

Last reviewed 2026-07-03 3 min read

Resolve QuickBooks Desktop Error 3371 ("could not initialize license properties") by resetting your entitlement file and re-entering your license info with

When you fire up QuickBooks Desktop and are stopped dead by Error 3371: Could not initialize license properties, it means the program is failing to read its own activation data. This is a startup and licensing roadblock, not a problem with your accounting data. For anyone maintaining an older, discontinued version of Desktop, this error is highly fixable without contacting Intuit or upgrading your software.

Understanding the 3371 Error Family

Error 3371 belongs to a family of licensing and startup codes (which includes nearby codes like 3371, 3372, and 3180). They all generally point to the same mechanism: QuickBooks cannot validate your installation.

In older, unsupported versions of QuickBooks, this is almost always caused by a corrupted or missing license data file (specifically, the EntitlementDataStore.ecml file). It can also happen if your operating system recently updated and altered folder permissions, or if an antivirus program quarantined a file QuickBooks needs to boot.

How to Fix Error 3371

The goal is to force QuickBooks to rebuild its licensing file. You can do this by deleting the damaged file and letting the program recreate it. Because folder paths differ slightly depending on your exact version of Windows, these steps are family-general but will work for most Desktop installations.

Close QuickBooks entirely: Make sure the program and all its background processes are shut down.
Open the hidden folder: Open your Windows File Explorer and navigate to C:\ProgramData\Intuit\Entitlement Client\v8 (or whichever version folder exists, such as v6 or v12). Note that ProgramData is a hidden folder by default, so you may need to enable "Hidden items" in the View tab to see it.
Delete the ECML file: Look for a file named EntitlementDataStore.ecml. Right-click and delete it. Do not worry—this is just a cache file. Deleting it will not harm your company file or your actual license.
Restart your computer: This ensures all background QuickBooks services are cleared.
Re-enter your details: Open QuickBooks Desktop. The software will detect the missing file and prompt you to re-enter your License Number and Product Number to rebuild the data store.

If you have misplaced your license and product numbers over the years, check the original purchase confirmation email, the sticker on your installation CD sleeve, or look within QuickBooks by pressing F2 or Ctrl+1 (if the program lets you get that far before throwing the error).

Using QuickBooks Tool Hub

If you cannot find the file, or the error persists after deleting it, the QuickBooks Tool Hub is your next best step. This standalone utility is designed specifically for older Desktop versions.

Install the Tool Hub, open it, and navigate to the Installation Issues tab. Run the QuickBooks Install Diagnostic Tool. This tool automatically checks for damaged installation components and repairs the background framework (like MSXML and .NET) that QuickBooks relies on to read its license properties.

Preventing the Error from Recurring

Once QuickBooks is running again, you want to keep it that way. Error 3371 often recurs when aggressive antivirus software scans and damages the EntitlementDataStore.ecml file during a routine sweep. Add your QuickBooks installation directory and the ProgramData\Intuit folder to your antivirus exclusion list.

Additionally, if you are running a discontinued version of QuickBooks, keeping the software entirely offline is the safest way to prevent forced updates or background syncs from altering your system's folder permissions.

When to Check Your Company File

In the vast majority of cases, Error 3371 is strictly a licensing and startup issue. However, if QuickBooks successfully opens after you reset the entitlement file but immediately crashes when you try to open your specific company file (.qbw), your company data may be damaged.

If the program boots up fine but refuses to load your books, you are likely dealing with data corruption rather than a licensing failure. In that scenario, you will need to repair the damaged company file to get your accounting data back on track.