I've been having random issues with my computer for a long time now for small periods. For example one week my computer will freeze at random times and then crash, next week it will be fine, and then the a week or two after it has problems again.
Each time has had a different solution, including simply plugging in a network card (I believe it is one), or removing a program called Pando Media Booster (a torrent program installed when I installed a game called League of Legends).
This time, it's been two weeks of being fine after removing Pando Media Booster (the last solution to this problem). Now it's freezing again, it's generally been random at times of freezing. Some examples of what I'm doing when it freezes and crashes: in a League of Legends game while playing music via iTunes in the background, making a powerpoint presentation for school, or removing unused programs that might be causing the problems (in the control panel>uninstall a program).
The last time my computer froze I was watching a TV show on a website (it's the website of the TV channel that actually airs the show, not a 3rd party website) with one tab open to facebook. On top of that I had iTunes open but it wasn't playing music or anything, it was just open from me earlier syncing my iPod.
So basically what happens is my computer doesn't technically freeze but it simply becomes unresponsive. For example, I could open a new tab but it won't be able to load any page no matter what url I put in, I could go and highlight different songs in my iTunes list but as soon as I made it try to play the song iTunes would actually freeze and become completely unresponsive. I could not close any programs either, I could open the Start Menu but I could not open any programs or shutdown/logout of my computer. After waiting about 5-10 minutes for the computer to respond, the screen instantly goes black and the computer basically restarts itself.
When the computer restarts itself after crashing it cannot load past the "Starting Windows" screen. The screen I'm talking about normally has "Starting Windows" show up with the black background and then blue, yellow, green, and red balls show up and spin around forming the windows logo. Generally after a crash it either only shows the words "Starting Windows" at this screen and no balls ever show up, or it shows a black screen with white words in the top right saying "A disk read error occured Please Ctrl + alt + delete to restart". Here's a video I found of somebody else having the exact same screen show up: http://www.youtube.com/watch?v=PGz2gkAhn5o
I generally have to wait about 15-30 minutes with my computer completely shut off in order for my computer to load up normally again. This whole freezing process is spontaneous, I can generally have a normal working computer for about 15-30 minutes after startup and then this occurs. I do not think this freeze and crash will occur if I leave the computer on but not used, or if I only do one task at a time (i.e. one tab only, no other programs), basically small processes but anything like a game or iTunes + anything will freeze it.
This computer is a year old, it was given to me by my uncle who works for the U.S. government as a computer engineer. I am running Windows 7 but originally I believe it had no OS but I gues my uncle installed Windows XP on it and then upgraded it to Windows 7. Now one of the first times I had this problem I made a complete system recovery, restoring it to basically factory conditions. This caused my computer to have no OS but I did have the Windows 7 Upgrade discs (not the actual Windows 7 installation discs) but I found many articles explaining how to use a Windows 7 upgrade disc to actually get Windows 7. This issue current issue, however, has always been around before I did this "illegal" method of getting Windows 7.
My system specs are as follows
Windows 7 Home Premium 32-bit
CPU - AMD Phenom 9750 Quad-Core Processur, ~2.4 GHz
RAM - 4096MB RAM
Graphics - ATI Radeon HD 4200, 1660 mb of memory
I can add more info if needed, this was basically all I could figure out in the dxdiag tool.