atikmdag.sys BSOD

This is typically caused by the wrong or corrupt display driver installed. In your case, the ATI Radeon Kernel Mode Driver.

Code:

Unable to load image \SystemRoot\system32\DRIVERS\atikmpag.sys, Win32 error 
0n2
*** WARNING: Unable to verify timestamp for atikmpag.sys
*** ERROR: 
Module load completed but symbols could not be loaded for 
atikmpag.sys
Probably caused by : atikmpag.sys ( atikmpag+cc9c )

Code:

Loaded symbol image file: atikmpag.sys
    Image path: 
\SystemRoot\system32\DRIVERS\atikmpag.sys
    Image name: 
atikmpag.sys
    Timestamp:        Wed Jul 15 20:13:26 2015 (55A70536)
    
CheckSum:         
000B2165
    
ImageSize:        
000A8000
    Translations:     0000.04b0 
0000.04e4 0409.04b0 0409.04e4

Check to see if there's an update for your video drivers.

There are updated drivers on the HP support site for your laptop model dated Aug 7, 2015. There's also a BIOS update. Bring your system up to date then perform the steps in the tutorial below if the BSODs continue.

Troubleshoot Application Conflicts by Performing a Clean Startup

Update:
I noticed a huge number of ntdll.dll errors in your logs. Before you do the clean start, run SFC /scannow using this tutorial. SFC /SCANNOW Command - System File Checker