How to fix QuickBooks Error code 20 – Printer Not Activated

While upgrading from Windows XP or Vista to Windows 7, youmay face QuickBooksPrinter not activated Error code 20.  This error happens becausethe ‘new operating system’ puts out the Hkey_ Current_config\ software key in
the registry settings. In other words, the entries found on the key are not
updated when you upgrade the Operating system. In some applications, the exact
key is used to store the internal settings that lead them to fail the update.
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