I'm having the same issue. It started with another intuit product ProSeries 2015 and then Quickbooks 2013 would't start. I disabled protection and even unloaded. The only thing to make Quickbooks work again is to uninstall. I uninstalled last night to fix a computer, downloaded the new version of Emsisoft last night. As soon as I reinstalled, Quickbooks stopped working again until I uninstalled Emsisoft Internet Security. Event logs show appcrash QBW32.exe ntdll.dll.