Bought my Dv7-6195us around August (2011) and started having these exact same issues around the end of September.
My setup is included in the .txt file attached to this post.
I have done all of the tasks and suggestions that are given on the HP site, updated all of my drivers (that HP provides on there website, that Intel provides on their website, and that Windows Update detects), removed any possibly problematic new software (had my current setup all installed on a desktop machine before (custom built) with absolutely no problems whatsoever), ran the lastest anti-virus-malware-rootkit detection and found no errors or problems, did multiple Memory, HDD, and periphreal hardware tests all passing 100% successful with no errors reported everytime they are run, have ran SFC in command prompt and it comes up clean, no errors, and have tested both "Fixed" and "Dynamic" modes in the new BIOS update for the video setup, which doesn't seem to alleviate the problem.
Alright, that being said, here are the exact symptoms my comp. demonstrates when having this problem. Some sort of video processing is occurring at the time of the BSOD. It could be playing a video in either Media Player or VLC, Skype video-chatting, or the like. I haven't experienced the problem while watching in-browser videos, like on YouTube (which leads me to believe somehow Flash is exempt, but whatever). The BSOD errors are different, but the most reoccurring ones are "System Service Exception", the ol' "Driver_IRQ_Not_Less_Than_Unequal" (or whatever that exact wording is), and no message at all, just a notification that a possible video driver is awry.
What happens then: I turn off the computer to reboot, turn it back on, I get the boot-up options screen offering safe mode and whatnot, try to boot in regular or safe mode (makes no difference), get another BSOD lock-up during boot, the comp automatically restarts, I'm asked to run Startup Repair, which I do (cause if I don't it rarely boots up correctly). I don't choose a System Restore (that has not helped when I tried it many times before). The process runs (takes about 15 mins) and then tells me it can't repair the issue automatically and wants to send the information online, which I choose. Then I look at the detailed error report and it always, ALWAYS shows the same results:
All tests finish quickly (several milliseconds) and report no errors, EXCEPT the last test checking System file information, which takes the vast majority of that 15 mins, and returns the error "0x490".
This has been like clockwork. I found that if I uninstall video drivers and reinstall them, then I get some reprieve for some time (maybe a couple of days) until the original BSOD happens again and then the cycle restarts.
I wonder is the fact that there are dual video options that switch (even though, as I stated above, it doesn't matter if I turn this feature on or off in BIOS, as well as on the desktop with the CCC)? Also, the dedicated ATi drivers are based on AMD chipsets, while the built-in drivers are Intel (as is the processor)...does that seem like a conflict of interest?
In any case, I'm focused on figuring out this problem, so I'm spreading the word to the pros so we can get this figured out!