Thank you for your reply. I have run through all your suggestions, restarting after each one, and am still hitting the "To continue using QB, you must install an update" wall. No settings have been purposefully changed under User Admin Controls but I still lowered them. I downloaded QB Tool Hub last night and ran it again without success. I have been using QB since 2006, upgrading to '14, '16 and '20 (due to new devices), and have never encountered this problem.