Could you please provide us with some more updates ;
What is the version of McAfee virus scan ?
What is the exact error you receive while scanning (If possible could you please attach a screen shot)
Please run McAfee virtual technician from here : http://mvt.mcafee.com and post us your session id
I have the same issue on one of our family computers. At first realtime scanning was disabled and continously got disabled every time I enabled it. When I tried to run a full scan the process was interupted after a few seconds with the same error message as displayed on the screen shot in this string.
Tried to run the Virtual technician wich found and corrected Registry issues in the first run and then keeps reporting everything OK. Yet Realtime scanning and now also Spyware scanning keeps getting disabled, and Full scan gets interrupted. Also updating of McAfee Total protection is not able to run - the program stops responding.
Have gone through all running processes and services without finding anything unusual.
This does not help solving the issue, but thought I would confirm the problem as beeing one seen on more computers and not just a single instance.
I decided to upgrade the PC from Windows XP to Windows 7 and reinstall McAfee Total Protection. Therefor I won't be able to test or confirm any suggestions on how to solve this issue in a less disruptive manner.
Please try the below steps and let us know the status;
Check and uninstall if you have any other security software
Navigate through C:\program files & C:\program files\common files & delete if you have the other security software folders
Open command prompt (Run as Administrator) and type the following and press enter one after another
Regsvr32 jscript.dll and press enter
Regsvr32 vbscript.dll and press enter
Open Internet explorer – Click on Tools > click on Internet options > then click on the tab – Advanced
Hit the button Reset . Close all open windows
Restart the PC and try scanning