quickbooks error code 15240 is an error code that is caused by a damaged installation of QuickBooks. This error can occur when the installation of QuickBooks is incomplete, corrupt, outdated, or damaged. It can also occur if the Windows system files are corrupted due to virus or malware attacks. To resolve this error, you need to repair or reinstall QuickBooks. The best way to get help with QuickBooks Error 15240 is to contact a certified QuickBooks expert. Dial +1(855) 738-0359.