Unexplainable phenomenon

Question

First off i would like to say thank you to all the Hp support people for putting up with me continueing to come back here asking the same kind of questions, Secondly i would like to appoligize that i have not explained this better and also, how long this explanation is.....
     Now for the problem, My hard drive in a sense "Freezes" when i do things on my computer such as play games, watch youtube videos, or even talk on skype. Sometimes this problem happens when my computer is on and i'm not even on it, it's just idleing. Now, when i go to the task manager the disk is reading at 100% but when i scroll down everything on the list is at 0. After some time of this happening the computer will blue screen and crash. Also, another way it will crash is it will essentially shut off the backround, all the icons will disapear, the task bar will vanish, applications will crash and others will come up saying there was a hard drive error and then the computer will crash. Now, for the really weird part. My, computer will automaticaly restart after it has crashed and when it goes to do that it gets its self into a blue screen loop untill i power it down. Then, I have to wait 5 to 10 minuets before i can attempt to turn on my computer or it Will bring up a screen that say hard disk error please run so and so hard disk check. Now, when i go to try to do this "check" it is not even installed so i just shut it off and wait untill i can turn my computer back on then, it works fine untill it desides to crash again.
     Now, i know what you might be thinking, the hard drive is going bad and needs to be replaced and everything will be fine, but no. I have replace the hard drive in the computer with a better one (also mecanical) to try to solve the problem but it has not proved to be doing much for me. Also, i have taken my computer to a friend that is a professinal and he removed all the viruses from the OS and the rest of the computer with the software that he had. Also before I took it to him I was not able to update my computer what so ever. Now that he has removed the viruses from it i am able to manually install them from windows update. If i try to leave it up to the automatic then the update fails and the computer undos the changes and goes back into windows.
     So, at this point i can honestly say that it is not the hard drive it's self as a peice of tecnology, As for the operating system I am not sure. Recently I completely reset the computer removeing all my files and reinstalling the operating system. I'm not sure if the reset process actually reinstals the entire OS or just part of it which could still be allowing the problem to happen. When the computer is just on though the problem does not happen (usally). I also do not have the disk for the OS so i can't just reinstall it. But, then again i'm not completly sure that that is the problem
     Time for specs.
                          i5 intel 3.00 GHz processor
                          Nvidia GT 625 Graphics card
                          1TB SATA Western Digital (Black) Hard drive
                          6GB of ram (4gb stick and 2gb stick)
                          The MotherBoard is the one that came with it originally (so what ever that is)
     Now that i have had this problem for a while i desided to do a few tests. The hard drives read and write speeds are 170Mb per second, so it should be more than capable to handle what im doing on my computer. The next thing i did was i opened task manager and i downloaded a GPU monitor from the inter net so i could monitor everything that was happening while this problem emerged. Then, i opened the game JUST CAUSE 2, a game my computer should be more than able to play.
RECOMMENDED:
OS: Microsoft Windows Vista SP1 or Windows 7
Processor: Intel Core® 2 Duo 2.6 GHz or AMD Phenom X3 2.4GHz or equivalen
Memory: 3GB system Memory
Hard Drive:
Graphics: DX10 compatible graphics card with 512 MB of memory
(Nvidia GeForce GTS 250 series/ ATI Radeon HD 5750 series)
Sound: 100% DirectX 10 compatible Dolby Digital 5.1 sound card
DirectX®: Microsoft DirectX 10.1
Then,  When i bgan to play i started to watch the lavels of all my hardware. The CPU was running at a prtty average level for playing a game, The ram was at 3GB out of the 6GB that i have, The hard drive was running as normal pulsing every now and again to update grapic textures and send nessasary files to the game to make it run correctly. Then i look to the graphics card, The graphics card GPU load was averageing 98% The cpu was at its max clock speed, the cards integrated memory was at 789Mb out of the 1Gb that it has the fan speed at 47% temperature was around 47 celsius which is not terribly warm. Now, i am not sure if a graphics card has anything to do with the hard drive but if it does that could explain why. The game it's self was running at 60FPS and i was experiencing no lag at all. Then, randomly the hard drive began to do its problem that it has been having where it is at 100% but litterly nothing is happening. Then i notice that when the hard drive froze so did the graohics card. When the drive froze the graphics card droped down to zero percent and thats when the game froze. Then there were other time were the hard drive would freeze but the graphics card would not so the game would still be playable.
     Personally i do not know a whole lot on how computers actually work. Most of my knoledge is, what the parts are and what they do, but past that i have know clue. I turn the computer on do a few tests like i did and that ends my knowlege on how to fix the computer so, i appriciate being able to come here and get a little extra guidence. i hope that was not to much to take in but i wanted to be as descriptive as possible to maybe find a solution to this problem.
     If you happen to need any screen shots of anything whiles its happening i can get those, and if you need any more information please don't be afraid to ask!

Answer 1

Wow, that seemed a lot shorter in the editor, I got a little long winded.