QuickBooks Error 15106: Antivirus and Update Conflicts Antivirus programs like McAfee or Norton can block QuickBooks updates, triggering Error 15106. Temporarily disable the antivirus or add QuickBooks as an exception to resolve the conflict. https://asquarecloudhosting.quora.com/How-to-Effectively-Deal-with-15XXX-Errors-While-Updating-QB