While updating QuickBooks desktop or downloading the newest payroll update. The user will come across QuickBooks error 15240. QuickBooks error 15240 usually occurs due to web browser security settings or misconfiguration of Firewall settings. A common real cause to error 15240 is incorrect data & time settings when you look at the system. QuickBooks error 15240 may appear to users as: QuickBooks Error 15240: The payroll update did not complete successfully QuickBooks Error 15240- File Exists: The file you specified can not be opened. Make sure it isn't being used by another program. QuickBooks Error 15240- web connection error: unknown error Factors behind QuickBooks Error 15240 Incorrect date & time in the system QuickBooks not installed correctly QuickBooks not running as administrator Payroll subscription expired Internet Explorer Security misconfiguration Windows files permission problem Firewall Settings configuration Windows file damaged QuickBooks company file damaged Just how to Resolve QuickBooks Error 15240? Due to different causes to QuickBooks error 15240, there are different troubleshooting methods to resolve the error 15240. Follow and perform the below-mentioned troubleshooting steps to repair the error. Verify Internet Explorer Setting to repair QuickBooks Error 15240 Open IE Go to Internet Options Go to Advanced Tab & Under Security option Check use SSL2.0 & SSL3.0 Click on apply and Ok Run QuickBooks as an Administrator to solve Quickbooks Error 15240 Locate the QuickBooks icon in your desktop. Right-click regarding the icon and select run as an administrator option. Ensure Firewall Configuration to repair QuickBooks Error 15240 Open Windows Firewall Head to Advanced Settings Right-click on Inbound Rules Choose New Rule Select QuickBooks & Next Select The Program Path Browse & Ensure these files are given access to undergo your firewall qbw32.exe qbupdate.exe Choose to Allow the Connection Click on Next Enter the rule name depending on your wish & Select Finish Configure Windows Permission to Installation Folders to Resolve QuickBooks Error 15240 Close all running QuickBooks windows Go to C drive on the system and locate program files(X86) Browse to Intuit folder, right-click and choose properties Head to security and select advanced tab Make certain that the master of the folder is User Group To create User group as owner, relate solely to tech support team to help you out Contact Support To Eliminate QuickBooks Error 15240 If above-mentioned steps do not help you resolve QuickBooks error 15240. Get in touch with the technical support team of QuickBooks to solve the error for your needs. You are able to reach QuickBooks tech support team on QuickBooks support phone number +1888-557-6950.