If at all the Real tine scanner is not turned on; you wont be able to initiate a scan in McAfee. So we will have to enable Real time scanner - To do that please run McAfee virtual technician from here : http://mvt.mcafee.com which is an automated tool that would diagnose and fix any problem with McAfee. Do remember to post your session id .
If the real time scanner is stil disabled, please let us some of the below information ;
What is the operating system of the computer ?
Do you use any other security software in teh machine ?
Did you perform any system restore in the machine ?
Do you have any virus pop ups/alerts in the machine
Please update us on the status and we will help you proceed further witht this.
I am also having the same problem but on a Windows XP machine. Prior to my problem I regularly get Mcafee updates and run full scans no problem. Last Sunday I was the victim of a virus which prevented any user action after boot up. Mcafee did not appear to stop it infecting my pc in the first place (I am surprised). I rebooted in safe mode and eventually removed the virus using another (free download) antivirus package. I can now do a normal reboot but the Mcafee full scan consistently fails (quick scan is ok). I ran virtual technician but it was clean. I suspect that there is a conflict between Mcafee and the new installed package (see doc id TS100903). My dilemma appears to be that my new antivirus package works, where Mcafee does not. Do I renew my subscription next time?
Not much help but you are not alone.
PS Correct doc ref is TS100376
Running the virtual technician did the job and fixed it! Thanks to everyone for their help!