Malware pop up
Getting Malware pop-up, "DiskUtil" will damage your computer. You should move it to the Trash. I keep moving to trash but pop-up persist. What can I do?
Safe Boot from the HD, (holding Shift key down at startup), does the problem occur in Safe Mode?
Safe mode attempts to repair Disks & clears lots of caches, so if Safe Mode works try again in regular boot.
The free Malwarebytes which may take care of it...