Windows 7 BSOD 'Page fault in non paged area'

[LaveyanCrow]

I am not exactly sure what this error I'm receiving is related to, so I'm sorry if this is the wrong category:
Lately, when I go to my external hard drive (Seagate GoFlex FreeAgent 1.5TB) directory on 'my computer', most of the time (not always) my computer freezes and a blue screen shows up with the following message:

A problem has been detected and windows has been shut down to prevent damage to your computer.
winfl32.sys
PAGE_FAULT_IN_NONPAGED_AREA

If this is the first time you've seen..............

Technical Information:
STOP: 0x00000050 (0xc863c000, 0x00000001, 0xAA145EC0, 0x00000000)
Winfl32.sys - address AA145EC0 base at AA144000, Datestamp 499f052e

Collecting data for crash dump...
initializing disk for crash dump...
Physical memory dump complete.
Contact your system admin or technical support group for further assistance.

I tried cleaning my registry with various softwares such as CCleaner and Uniblue registry booster, and also scanned my system with Bitdfender 2012 antivirus software, but nothing was found. I've also performed a chkdsk using cmd.exe and no sector errors were found. I think the problem might be with my cache or RAM.

Your help is appreciated. Thanks in advance

 

[p000n-tang_be4r]

Im not very good with this stuff but i did a search on google and got this:
http://technet.microsoft.com/en-us/library/cc957625.aspx
http://msdn.microsoft.com/en-us/library/windows/hardware/ff559023(v=vs.85).aspx

Hope it helps you. Good luck

 

[pjmelect]

The first thing you should do is to run "Chkdsk /f /r" on the problem drive, this should fix the problem.