BSOD when starting certain programs (Skype etc)

I recently just built my PC yesterday, installed all of the drivers from their respective sites, windows update and related things. Now, when I start up Skype, my screen turns black, and then turns back on with a notification in the windows tray saying that the AMD display drivers has crashed and recovered. If I close Skype and start Skype again, I would receive a BSOD with the error 'atikmpag.sys'

OS: Windows 7 SP1 64-bit Specs: ASUS H81I-Plus iITX
Intel i3-4160
ASUS Radeon R7 260X
Corsair Vengeance Pro 1600MHz 8GB (4x2)
Western Digital Caviar Blue 1TB 64MB
Corsair CX500M 500W Bronze 80+

I've attached the zip file of the .dmp file along with the post. Thanks in advance for the help :)

Edit: Did sfc scan, went fine with no errors.

Hi Zyfler,

For a full analyse please read BSOD Posting Instructions

The cause is your AMD Video driver.
Please use Display Driver Uninstaller to remove everything from AMD and install new drivers

Code:

*** WARNING: Unable to verify timestamp for atikmpag.sys
*** ERROR: Module load completed but symbols could not be loaded for atikmpag.sys

2: kd> lmvm atikmpag
start             end                 module name
fffff880`04626000 fffff880`046ce000   atikmpag T (no symbols)           
    Loaded symbol image file: atikmpag.sys
    Image path: \SystemRoot\system32\DRIVERS\atikmpag.sys
    Image name: atikmpag.sys
    Timestamp:        Tue Aug 04 03:42:28 2015 (55C01884)
    CheckSum:         000AF3B6
    ImageSize:        000A8000
    Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4

I've reinstalled my drivers using DDU, including ticking 'remove AMD folder in C:', and installing the newest version taken from the AMD site, the error still persists. I've caused the BSOD to repeat by opening Skype twice.

Edit: The 'BSOD Posting Instructions' link you sent me didn't work, I am sorry if I posted the information wrongly.

Edit2: I searched on the posting instructions and followed them, the proper zip file is now attached.

Edit3: Sorry on the information given, I missed out on the PSU, just added it in.

Thank you for reporting the broken link, I'll edit it within a 10 minutes and check the zip file

Please remove any dust inside your pc properly.
If it doesn't help, note the temperatures of your gpu when idle and under load.

Please visit Windows Update and install every update available, it may take a couple of times to get them all.

Good to hear :)
If you get any crash, please use the tool and upload the zip file.

You're welcome :)