Try to Google these and update it if possible:
SCDEmu SCDEmu.SYS Mon Aug 06 20:15:06 2007 (This is for PowerIso - update that to at least 7/26/2009 version 22.214.171.124)
RTKVHDA RTKVHDA.sys Fri Aug 29 05:28:27 2008 (This is for Realtek sound driver
- update that.)
secdrv secdrv.SYS Wed Sep 13 09:18:32 2006
You could try to monitor temps with ATI Tray Tools to see if that may be a problem.
Let us know if you find anything out about those two suggestions, or how it goes.