I have was experiencing a similar thing with my desktop today (event entries for eventID 5379 - about 20 entries in one second - but no crashes + eventID 4798 - random frequency but typically every 1 to 4 seconds).
I had alternating sets of log entries for of event 5379 and 4798 and a constant "disconnected device" sound alert. I came across an article about a failing USB device so I disconnected my USB memory card reader and both the sound alert and the log entries for those 2 eventID's have stopped for the past 20 mins.
It could be that the card reader is failing or perhaps not properly plugged in. It could be the USB plug itself that has an issue, I haven't tested any further yet, I'm just glad that the constant bleeps have stopped!