Every time a user attempts to update QuickBooks or payroll, they are met with the error notice "Error 15106: The update software is damaged, or Error 15106: The update software cannot be opened." Error 15106 mostly impacts the update function. Accounting software firewall restrictions and a lack of administrative access are the main causes of the QuickBooks payroll update issue, in contrast to other 15XXX series errors. Please read the entire article until the finish for information in depth as we have covered the causes and fixes for QuickBooks update error 15106 in more detail.