The easy and best methods for troubleshooting QuickBooks error code 1606 are listed below. Before embarking on these methods, make sure to temporarily disable your Windows Firewall and antivirus, as they may cause impedance in the troubleshooting process.

Method 1: Reinstalling the update upon logging in as an administrator

It is advisable to log in as an admin and then reinstall your QuickBooks updates once again. The procedure is quite easy, and all you need to do is follow the steps depicted below:

•           The inceptive step requires a restart of your computer system.

•           Use your admin credentials to log in to the system upon restarting.

•           Now, try installing the QuickBooks accounting software once again.

•           If the error still pops up, you should resort to the subsequent method, which involves the reinstallation of QuickBooks in the Safe Mode.

Also read: how to transfer QuickBooks to a new computer

Method 2: Get QuickBooks reinstalled in the Selective Startup Mode

Making use of the selective startup mode while installing QuickBooks is an effective approach towards the fixation of QuickBooks error 1606. This mode is recommended because while this is in operation, most of the conflicting applications in the background are turned off.

•           Initially, you need to navigate to the "Run" command from the start menu

•           When the run window is open, you should type in "MSConfig," and after that, click on OK.

•           Within the system configuration window, advance to the "General" tab and then opt for "Selective startup."

•           After that, opt for "Load system" services.

•           In the "Services" page, tick the "Hide all Microsoft services" box.

•           Opt for "Window Installer" from the list of services, and then tap on "OK."

•           Final step requires you to choose "Restart."

•           Now, download the QuickBooks.exe file from the official website of Intuit.

•           Then, start the installation process by double-clicking on "QuickBooks.exe."

•           Follow the on-screen instructions and accept the license agreement.

•           After inputting the product and license keys, you need to hit on "Next."

•           Having successfully performed all the steps given above, you need to reset the startup mode to normal mode. For this, implement the below-given directions:

•           Hitting on the Windows + R keyboard keys will display the Run window.

•           In the window, you are required to enter "MSConfig" and then click on "OK."

•           Now, opt for Normal startup mode on the General tab.

•           Finally, tap on "OK" in the System Configuration window, and then choose "Restart."

Our thorough discussion on QuickBooks error 1606 is now complete. Hopefully, the methods mentioned herein should have been valuable when it comes to the fixation of QuickBooks Error 1606. You can contact our 24/7 QuickBooks error support team via our helpline i.e., 1-800-761-1787 for redressal of any related queries.