Have you ever attempted to upgrade to a newer version of Windows and met with an error? If that's the case, the QuickBooks error code 20 is probably to blame for the printer not being activated. When this occurs, it is because an upgrade to the operating system has added the H-key Current-config software key to the registry settings. This prevents you from printing pay stubs, forms, or PDFs, as well as sending email-based invoices to customers. The QuickBooks desktop application may display the printer not activated error 20 for a variety of additional reasons as well. In the following part of this blog, we will go over all of these possible justifications as well as potential solutions to the QuickBooks error code 20. Read More: