Norton Error Code 9999 174 is a common technical error that affects your security software and can slow down your system. When you get a notification about Error Code 9999 174, you should run the System File Checker tool to replace the corrupted files. You can also perform a Windows System Restore to fix any error that may have been caused by an app that you installed recently. If you want to know more about the solutions mentioned above, you can call the Norton customer support number and ask for additional assistance. Experts will be able to give you advanced solutions to fix Norton Error Code 9999 174 in no time. Read More:- https://www.antiviruscareonline.com/norton-support-number.php