SecurityScanner.dll is a Dynamic Link Library (DLL) file used by McAfee security products to perform scans of files and other system resources for malware and other threats. This DLL file is an essential component of McAfee security products, and without it, the software may not function properly. If you encounter an error related to SecurityScanner.dll, it could indicate that the DLL file is missing or has become corrupted. This could prevent the McAfee security product from functioning properly, which could leave your system vulnerable to malware and other threats.

To resolve this issue, you can try reinstalling the McAfee security product to ensure that all of its components, including SecurityScanner.dll, are installed correctly. You can also try running a system scan to detect and repair any errors or issues with your system files. If these steps do not resolve the issue, you may need to contact McAfee support for further assistance. They may be able to provide additional troubleshooting steps or help you repair or replace the SecurityScanner.dll file if it is found to be corrupted or missing.