In most cases, users also experience their Norton Setup running the scan process for so long but end abruptly without completing the full scan. In other cases, the scan also causes you personal computer to shut down automatically even when the scanning is in progress. These errors can be fixed by executing a few troubleshooting steps.
Prior to beginning with the direction, end every running task and restart your computer. Turn on your computer and try to scan a file and see if it scans properly, if yes then attempt performing full PC scan. If you face the same problem again, refer to the instructions below and try fixing the error.
Note: Check your device and make sure there is no parallel security software installed on it even if it is an older or another version of Norton Setup. If there is any existing antivirus, go to control panel/ settings and uninstall the program.