I'm having the same problem. The system was fine last November and sat for about four months. When I turned it on last night, after all updates were applied and Outlook was downloading emails, the "freezing" issue started. After rebooting it stopped and I was hoping it was a one-time deal. After using the system for about 5 hours today, it started up again. Last night I was able to still use the computer, albeit very difficult. Today I wasn't even able to close windows (I think I managed to get two before I gave up and hit CTRL+ALT+DEL). The system was back to being normal/responsive after the ctrl/alt/del screen appeared (no idea what it's called). I logged out, forced applications to shut down (the shutdown process took a bit longer than usual), logged back in and the problem persisted. I rebooted the computer and the issue stopped.
I decided to take a peak in the Event Viewer since the issue seems bizarre. I, too, found many 5379 events. I usually don't even bother with the Event Viewer because of the plethora of events that tend to be logged in there. However, in this case, I think the 5379 events ARE significant. Looking at the time stamps, they began occurring around the same time the freezing issue began. I tried to use the computer while the issue was happening for about ten minutes and there were eight pages (around 130 entries) of 5379 events occurring within seconds of each other.
The same seems to be true from last night. There was a handful of 5379 events when I first logged in but during the first five hours of use there weren't hundreds of them, so... I'm off to search for more answers on this. Will come back here if I find one.