BSOD when going full screen on youtube

Hello everyone I had recently built my own machine and everything was working perfectly for about 3 months then i started to BSOD when going full screen on Youtube and I do not know how to analyze the minidumps.

So, i ask of the constituents of sevenforums if they can help.

My Windows 7 is...
- x64
- the original installed OS
- Full Retail

- The System hardware is only 3 months old brand new
- The OS was also only about 3 months installed

Two issues

1-Avast

2-Related to athrx.sys Extensible Wireless LAN device driver from Atheros Communications, Inc.


Avast can be a contributing cause of BSOD'S . Please remove and replace with Microsoft Security Essentials AT LEAST TO TEST


http://files.avast.com/files/eng/aswclear5.exe

Microsoft Security Essentials - Free Antivirus for Windows

* Did you run a FULL SYSTEM scan with Malwarebytes?


Re-install the Atheros driver with the newest version available.