Cleaning the dust out of the computer will help a lot. Dust clogs up all of the places designed for the components to keep themselves cool. A can or two of compressed air will do wonders for that. Don't try using an air compressor as it has moisture that comes out with the air which is the last thing you want. I also can't tell from the picture, but it appears some of the cables are laying on your graphics card. If so, that is a no-no, try to tie them up with zip ties and get them off of the card. Your case, as with most OEM cases, is not conducive to good cable management and do not usually have many fans in them. The idea is you should have airflow going from front to back and cables out of the way of blocking that airflow. As many fans as you can get bringing cool air into the case is important. Your components are cooled by the air inside the case. The cooler the air is the better they will cool themselves.
I realize this is Christmas Eve and tomorrow is Christmas and you have much better things to do than worry about a computer.
If you would, please run the BSOD posting instructions again www.sevenforums.com/bsod-help-support/96879-blue-screen-death-bsod-posting-instructions.html#option2 and upload the unaltered results here.
This is one of the longest tests you will probably do. It does not have to be watched, in fact most people run it before they go to bed and leave it running overnight. It has to be run for 8 complete passes, all at the same time. So, whenever you have time to do it, please run it for a minimum of 8 passes or until you get an error. If you get an error you can stop the test. To run 8 passes should take around 10 hours.
Please Run Memtest86+
Information
Please download from this site only
http://www.memtest.org/ in the middle of the page are the Download links, you can download the ISO.zip or the Auto USB Flash Drive installer.zip
Extract the Zip file. If you chose the ISO image, burn it to a CD using Windows Disk Image Burner or any Image burner you may have. If you downloaded the Auto USB installer, extract it, insert your USB 2.0 Flash Drive and take note of the drive letter. Run the installer, select the Flash Drive Letter, check the format box and press next. It will install memtest86+ to a flash drive. You can use either V4.20 or V5.01. Boot from your selected media. If you use V5.01 it will tell you to press certain buttons at the start, please press no buttons. The test will begin on it's own and continue to run until you stop it. It needs to run for 8 complete passes or until you receive an error. If you receive an error, stop the test. Even 1 error is a fail. Each pass tests a different part of the ram and each of the 10 tests in each pass tests something different. It takes a minimum of 8 passes to completely test the ram, more passes are better. It is quite a long test and will take several hours depending on how much ram you have. Due to the time length it is best to run overnight. If you have any questions, please do not hesitate to ask