McAfee has published a link in helping to sort out issues such as yours.Required Reading - Home User Assistance Malware Troubleshooting
If the issue still persists then you could try a few of these programs both of them are free to use. www.malwarebytes.org and www.superantispyware.com You may need to download these on a non infected computer and need to download onto a usb stick. Sometimes virus and malware are written to protect themselves so I suggest you rename the download file and also the installation folder to something you can easily remember. Check for the latest updates and run the program and let it clean everything it finds. Reboot the computer and do the same for the other program and reboot again
I'm moving this thread to the malware discussion community....