In certain instances a 'Restart' is required after a Version/Build Upgrade, and is always a good thing to do. Simply let the new features load fully and filter through your system,before you start using your machine. Mine always upgrades and completes as I have mine set on Automatic.
That reminds me. I used to get a reboot is required message with an older version of McAfee. I don't appear to get them any more. In any case that's not the issue I'm having. Perhaps I will set it to Automatic to see what happens.
Yes that's another thing. When I open up the program (single right click and select "Check for Updates") and it happens to be a major one I get that message to close the program before it proceeds to completion successfully. It's only when a "new update" message pops up at the bottom right of the screen and I click to "update now" is when I have the issue explained in detail in my original post - but only if it's a major update. Minors ones proceed to completion OK.
Just noticed that after an update WebAdvisor was making Firefox slow. Turning off the addon fixed it. I then ran Chrome and WebAdvisor although enabled the browser was running fast as usual. As it turned out the addon was not working since it wasn't showing the colored icons next to each item after an internet search. So I rebooted, re-enabled WebAdvisor in Firefox and all is now OK. Sad to see McAfee dropping the ball here for not advising me to reboot after an update. The worry here is the update was not a major one, at least I didn't think it was since it was fast. This effectively means I should reboot each and every time I get an update to make sure. NOT HAPPY!
Just to clarify. You normally are not required to perform a Reboot after a Automatic Update. However due to the fact that Web Advisor updates silently (In the background) differently than your Engine Versions/other features. One will notice that the Version/Build has changed after a restart.
In addition the issue you are discussing actually belongs in Web Advisor.