Windows 7: Bsod bad_pool_caller

Hi. Got my first BAD_POOL_CALLER BSOD almost a week ago.

BSOD happens on first start-up, the following reset launches windows as normal with a crash report. No BSOD during the work, but some slowdowns and ocasional freeses for 5-10 minutes happen to be.

Read some solutions and already installed regcleaner that found me 1500+ errors and fixed them. It removed some old issues (like photoshop crashes and some games not launching), but BSOD is still there.

I`ve run full chkdisk /r and it also found some problems and fixed them. But BSOD is still persisting.

Now i suppose that i have to reinstall/update some drivers, but i can`t figure out what drivers in particular. I`ve reinstalled catalyst and k-lite codec pack (as one of the problems that arose along with BPC is a crashing media player and problems with youtube videos), but still getting BSOD.

Here is an archive to the recent dumb files and a screenshot of the problem reported by windows right after it:

http://www.okim.nickersonm.com/BPC.rar
http://www.okim.nickersonm.com/error.png

Thanks in advance.

Probably caused by: AtihdW73.sys AMD High Definition Audio Function Driver: AMD Graphics Drivers & Software

Update that driver, Thanks

3 days it worked fine until today i got the same BSOD as before. I`ve reinstalled all ATI drives including Ati High Difinition Sound ones.

It once again happened at start up. This time i noticed a 'whirrring' sound of my hard drive shutting down right after i got the BSOD. Perhaps its a sign that its about to break?