Please provide this information so we can provide a complete analysis (even though you're not reporting BSOD's):
http://windows8forums.com/windows-8-errors-bsods/11837-how-ask-help-bsod.html
Also, please do the following:
- open Event Viewer (eventvwr.msc)
- expand the Custom Views category (left click on the > next to the words "Custom Views")
- right click on Administrative Events
- select "Save all Events in Custom View as..."
- save the file as Admin.evtx
- zip up the file (right click on it, select "Send to", select "Compressed (zipped) folder")
- upload it with your next post (if it's too big, then upload it to a free file-hosting service and post a link here).