First of all, I have to say: you have the patience of a saint. If I had to go through that, I'd likely be tearing my hair out and screaming at this point. 
Having said that, though, there's little recourse we can provide on the forums here. There are a few things I can suggest:
- Try calling the PSP hotline again, found in the Product Service Plan brochure. If they helped before, it's likely they'll be able to help again.
- Try calling Future Shop Customer Service: 1-800-663-2275 -- let them know all the trouble you've been through; it's possible they can accommodate something.
- Is there another Future Shop store nearby? You might benefit from having another team of technicians having a look over your computer, who might be able to find something the first team keeps missing.
I completely agree with Tanarus on this. You have tremendous patience.
From a technical point of view, my first thought strayed from the incorrect OS and towards more faulty hardware. Blue screens can be caused from a lot of software things however in your case I think it's a hardware issue. If I were back in the store working on your unit I would be running full hardware testing, including a 'burn in' test. Where as the same part is tested several times in a row to try and show failure.
Let us know if you have any more questions and how it works out for you.
As the unit is passed the 14 day return policy it will not quality for a 'refund' as quickinferno has mentioned.
Under your product service plan, a lemon is defined as a unit that has had 3 major hardware repairs and requires a 4th.
Did you contact the customer service line? Are they currently working on a solution with you?
So we took it in and described everything about previous repairs to the technician. During this the PC was hooked up to a monitor and I was able to show the technician that a stock program (empowering technology) was able to trigger blue screening every time it was opened. He asked if it was ok to remove the empowering technology program because it could be responsible, we agreed/said “OK“. He also explained why it could be the source, mentioning the BIOS settings, a boot options tab within empowering technology and other things I don’t feel qualified to try and accurately reiterate. So it seemed as though the problem was thoroughly understood, and the repair steps to address this were straight forward. The next day FS called saying that a update (operating system related, “One we would not be able to get on our own“) was needed to stop the blue screening, and again we OK what the technicians suggest. Once repair was completed and the computer is all set up back at home, I decide that the first thing I should check is that empowering technology tab which had been discussed so much, and it still blue screens. I obviously regret not having this checked at least once by the store, but anyways realizing that the update had not fixed the single problem it was intended to address surprised even me (even with the current track record)! I recollect the technician at the store speak in such a way that demonstrated extensive ability, to diagnose and fix such issues, but in reality the repairs were unsuccessful. I'm not sure what to do about this, but since it still functions I will use it as is.
Other than that the computer starts up and seems to work fine, I haven’t used it since I brought it home from repair 7, so we‘ll have to wait and see. Also I made a little video (2 minutes), which shows the strange stuff, I encountered right before the last repair (it shows the empowering technology tab issue).
http://www.youtube.com/watch?v=XHpM7eFSk5s
Thanks I really appreciate it 
