BSOD when changing Windows Appearance Settings

[RWBlade]

Hi there,

I'd appreciate it if somebody could tell me if this BSOD is anything for me to be concerned about. OS is Win 7 Pro x64 and the laptop is a HP 8740W. The system is rock solid as far as I know (it's stress-tested very often) and this is the first BSOD I've managed to get out of it. Win 7 was freshly installed around 2 weeks ago on the system and everything was updated. When the BSOD occurred I wasn't really doing anything except changing the Windows Appearance settings.

I didn't manage to grab what it said on the BSOD screen except Win32k.sys.

Files attached. Many thanks .

 

[writhziden]

Software Concerns:

It appears you have Comodo Internet Security and Avira installed. This may cause conflicts since they both accomplish the same tasks. When they scan or use the same system resources simultaneously, it can result in instability or blue screen crashes. Please choose one or the other.​

Analysis:

Crash resulted from the use of PDF-XChange Viewer. Probably not the cause; I suspect the two security programs conflicting caused the crash.​