Turning off real time scanning should have allowed the install as far as I understand. What file is in the quarantine folder and what folder was it found in?
If you can get the file best way is to disable real time scanner and restore the file. Zip it up as described in the link below and send it to mcafee.
When you get an automatic relpy do this.
In the reply Subject line must say
Prefix the email subject line with the word FALSE. For example:
FALSE: Game file being detected as