QuickBooks error code 3371 is directly associated with license initialization error. The QuickBooks error 3371 accompanies with status code 11118 or status code 1. In both cases, QuickBooks cannot load the license data due to some damage or missing files. QuickBooks needs some necessary files to run, and those are QBregistration.dat and MSXML components. If either of these files is missing or corrupted, then that leads to error 3371 in QuickBooks. You can resolve the problem by installing the latest Windows update. It can be done by navigating to the update and security section on your computer, click over Windows update and wait until you receive the complete updates. If you are still facing the problem, you may try to fix the license, validation, and registration errors in the QuickBooks desktop. Simply, you will need to download and install the QuickBooks tool hub. Launch the tool, click installation issues, click 3371 error fix, and click ok. Once the process completes, you can open the QuickBooks program.