Payroll updates encounter QuickBooks Error 15271 when a file cannot be verified. Usually, this problem is accompanied by notifications that show incomplete updates. Common causes include out-of-date software, improper system settings, or interference from User Account Control. Performing a clean install, modifying UAC settings, or updating QuickBooks are the ways to fix issue. To get in contact with a friendly and informed QuickBooks phone support representative, call 1.855.738.2784.