I'm not properly trained to look at your CBS log (yet, I'm learning!), but I can offer assistance in other ways.
Firstly, it's too late now but you should never run ComboFix without being told to by a trained malware removal expert. It's a very powerful tool that can very easily break your PC completely...
I know you're not experiencing BSODs, but could you please follow the BSOD posting instructions since they collect useful information -
BSOD Posting Instructions
Please then 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).
Regards,
Stephen