I suggest you use the program created by Etresoft, a frequent contributor. It will provide a snapshot of your system which we can analyze to possibly determine the cause of your problem. Please use copy and paste as screen shots can be hard to read. On the screen with Options, please open Options and check the bottom 2 boxes before running. Click “Share Report” button in the toolbar, select “Copy to Clipboard” and then paste into a reply. This will show what is running on your computer. No personal information is shown.
It is not a virus.
Try doing an Internet Recovery Boot by holding down Command + Option + R keys after power on. Then repair disk drive with Disk Utility.
Do you know what it could be ???
Does my MacBook have a virus??
