QuickBooks Error 12157 prevents payroll or software upgrades and is caused by problems with internet connectivity or wrong settings. Usually, it is connected to security protocols or Windows Internet. In order to fix it, you must update security settings, check internet options, and make sure QuickBooks isn't being blocked by firewall or antivirus software. To speak with a helpful and knowledgeable QuickBooks phone support agent, call 1.855.738.2784.