"Windows Security Alert" is a known rogue program which has been around for a while, and so there are many sites offering fixes to help you get rid of it.
Both suggest you use Malwarebytes, but if you have problems downloading it to your PC then use another (uninfected) machine and save it to a USB device with a different name. Boot your PC into Safe Mode and run Malwarebytes from the USB device using a quick scan. That should clear out the infection, but to be on the safe side once that is completed reboot and run a full scan.
I can't say anything about the Stinger results since I don't see them. Stingers anyway only target a limited subset of threats and may not pick this one up. If the Low Sensitivity stinger detected problem files you might want to rename them (replace the last letter of the extension with an underscore, so a .exe becomes a .ex_ file) and send them to McAfee for checking (see here for details).
Since there is the option of attaching files, I thought you might be able to see it
If there is a way of sending the logs to you, plz let me know. In safe mode w Networking, for some reason internet did not work - but I found the email addr (firstname.lastname@example.org), and will send them the logs.