Might be worth looking in Event Viewer and/or at SMART data in case the disc the OS is installed on is failing, as it is a part of Windows anti-malware it might be worth installing something like Malwarebytes to scan the system just in case.
EDIT: Is this the same as the error you are getting?
https://www.winhelponline.com/blog/securityhealthsystray-bad-image-0xc000012f/ if so replacing the corrupt .dll file seems to be the only way to fix it but I'd try and use another method than downloading a random copy of the dll file from online.