Your version of VirusScan may be a little old so the problem may still be that scheduled scans are delayed if the software senses hard drive activity. However as you didn't mention the version I'm only assuming.
Also, depending on version, updates are truly silent so you probably wouldn't notice them
Please post what is shown for SecurityCenter and VirusScan in 'About'.
By the way, McAfee relies on Internet Explorer being installed and it plus all its add-ons being totally up to date regardless of your default browser choice, so please install IE9 a.s.a.p. and then make sure all Windows Updates are current. (Assuming you have 7 SP1).
Technical Support are more than willing to help you free of charge by phone or online chat and that's available via Useful Links at the top of this page.
Actually, it didn't revert back to 15.28. That's the time showing as the scheduled scan time (but it should be 0700).
The 'next' scan time is now showing as 16.50.
And I have done nothing, not checked again for updates or anything.
I don't run any other security products, by the way.
Thank you Peter for such a quick response.
Last update: 14/01/2013
Anti-Virys and Anti-Spyware
Last update: 17/02/2013
Engine version 1438.0
Engine creation date:16/02/2013
That's the same version I have and my scheduled scan is turnbed off, but when I turn it on it reflects next scan at whatever the time is in the settings box.
Run the MVT to see if it will fix anything.
if that fails to fix anything then contact Technical Support.
BTW, you should update IE to v9.
Many thanks Peter.
Checked and am running on IE9, thought I was on 8!
It does get confusing at times doesn't it ? Especially with IE10 for Win 7 just around the corner.