event log summary

I have been trying to track down an error message I get when I start Firefox (does not happen when run as admin). It is one of those "program must close to allow previous installation attempt to complete". I can also turn off UAC and I don't get the error message.
But I was trying to find a way to track this down (which I haven't been able to do, even after a reinstall) and I have noticed the columns under the error occurrences in Event viewer seem to be incorrect. It shows 9 errors in the last hour but none in the last 7 days or 24 hours. It is almost like the columns are reversed and the numbers are being put in the wrong ones. I am getting so many errors, it is hard to tell sometimes.
I will check in a couple of hours and see if the 9 "in the last hour" column moves over to the "in 24 hours" column.
Thanks, Clark