how frequent are these freezes?
Nothing specific you've noticed your doing when it freezes? ex: playing videos, games etc
Currently looking over your files, as there are no dump files since it isn't Blue Screening.
Lets make sure your computer is setup to log these just in case.
Go to start and type in advanced system settings
tab if it does not come up already.
Under startup and recovery click settings
Under System Failure
make sure Write an event to the system log
is checked and Automatically restar
Small memory dump file (256 KB)
<!~~ Should remain
Check that see if its logging the information.
And enable Verifier with the following link (after making sure logs are enabled)
Using Driver Verifier to identify issues with Drivers
This will cause it to BSOD if its a driver issue.
NOTE: Keep Driver Verifier Running for awhile to see if its going to crash the system.
I have noticed your video card drivers are old version 8.17 is installed 10.12 is out now.
Remove these drivers via Device manager
Click Start type Device Manager
Expand Display Adapters
Right click Your HD 4600
Run http://www.guru3d.com/category/driversweeper/ to remove rest of ATI Drivers
Download Latest Drivers Here