Your latest dump file lists libusb0.sys as the probable cause.
Old and incompatible drivers can and do cause issues with Windows 7, often giving false error codes.
Random stop codes can often indicate hardware issues.
As a Priority:
libusb0.sys Tue Jul 07 17:53:02 2009 Apart from the fact I believe you can get this (outdated) driver from SourceForge, I've no other info.
sptd.sys Sun Oct 11 21:54:02 2009 The sptd.sys driver is notorious for causing BSOD's with Windows 7. It's a driver used and installed along with Daemon Tools and Alcohol 120 which you'll also have to uninstall.
Then use the correct (32bit or 64bit) download from Duplex Secure - Downloads to uninstall the SPTD.SYS driver.
Make sure to select the uninstall button! DO NOT SELECT INSTALL!!
pcouffin.sys Tue Dec 05 14:39:53 2006PCouffin is part of VSO software, related to CD/DVD burning software and has known issues with Windows 7. Update or Uninstall your current CD/DVD burning software.
fle5wnnt.sys Tue Aug 05 15:59:20 2003 WTF???? This ones even older than me!! If I had an old dial type phone I could give you a link!
flsiface.sys Wed Sep 10 13:41:45 2008
flspar.sys Thu Dec 09 16:10:59 2004
flsser.sys Thu Nov 18 11:28:39 2004
flsvcom.sys Thu Sep 11 17:33:18 2008 As above. Probably all connected.
giveio.sys Thu Apr 04 03:33:25 1996 Now we are getting silly!! Its an old driver that was used by Speedfan. Search it out and delete it. (I hope you're taking these comments with the tongue in cheek that I'm delivering them with!!)