I’m not simply hiding the errors, they are only listed in the event viewer, not displayed to the screen. I only start looking when it is a worthwhile exercise, e.g. same error repeatedly displayed to the screen. Then it is worth investigating.

I have just taken a peek, and several errors related to dropbox crashing which does produce an error to the screen, but not a thing related to avast going back to 20/05/2015. I contacted the dropbox forum but the only responses I got were from others experiencing the same problem.

Life really is to short to spend it in the event viewer.