Can you please restart the computer in safe mode and try to turn on Schedule scan and restart the computer in normal mode.
Jay, your solution worked though it was not without problems of its own.
While I could turn on Scheduled Scan in SafeMode, Real Time Scan was turned Off and I could not turn it On while in SafeMode. When I rebooted the computer and entered Vista normally, the Real TIme Scan was still turned Off and it was a bit glitchy for a few seconds. I went back and forth with the Real Time Scan setting and I finally got the ON setting to stick to the hard drive.
So, your solution did work but it introduced a temporary problem with the Real Time Scan setting. Also, it seems to get the Apply button to work, I had to check an item that I didn't want and then uncheck it to activate the Apply button. I'm sure some folks would not have done that and thought that the Apply button was permanently grayed out.
Your solution worked but perhaps this information should be passed on just the same.
There is no need to worry about it, as McAfee Real-Time Scan will be turned off in safe mode.
Well, then I guess my problem is solved. Thanks! DH