Most of the users might come across the QuickBooks Error Code 15106 due to several reasons. It generally happens due to damaged update program. For the instant resolution to such error, you should first login as an administrator. If you are still getting the same problem, you should consider turning off the ‘User Account Control’ for the time being. Moreover, you should also go with the fresh QuickBooks installation if you want the permanent resolution. Apart from that, it is also a recommendation to approach the QuickBooks experts and ask for help.