the event viewer will pick up any little hiccough your system has and will keep recording until you delete the logs and start again.if you are having issues the event viewer is good start for diagnosis but if you arent having any issues i would delete the logs and let it start again.another thing to consider is that if you have tweaked your windows to gain performance in any way,a lot of that will show up as errors as well.me,if i didnt have any issues,i wouldnt worry about it. just go into event viewer and select clear log on each of the logs.