The problem still persists, although now it does not happen every update, just once in a while.
Don't know if this information helps, but when the freeze happens and the PC returns to life, the order of the windows on the taskbar changes. Considering that I usually only have Windows Live Messenger and Firefox open (in this order), after the freeze WLMessenger kind of closes and re-opens the window, so that it goes to the last position.
Thank you for providing the information, I don’t see any issue with product installed in the system by reviewing the MVT session ID Report. Did you noticed any service which is taking the maximum CPU usage in the task manage when this happen Did you have this issue while opening any application along with McAfee update? There is a possibility of conflicting software in the computer so if you are using any other protection software please remove it (ex: Norton, AVG, zone alarm …..)
I have asked to remove the Malware bytes because it’s a free tool and used only for cleaning any junk files (Malware entry in the computer) which may conflict with McAfee update files. But please do revert back to us if you have any more concern