I'll post my specs later today thanks dawn1113,
when I looked in my bios it still showed my hard drive so I think that's still working fine?
I have read another post from a guy with the same PC he got almost the same problem..
he said he had bought a new hard drive but still had the problem..
then he changed his RAM and that was probably the issue so it may be the same problem as I have?
I don't think the fact that your drive shows in your BIOS is indicative of anything other than it is connected your motherboard, really. The BIOS will be able to detect a bad drive the same way it would detect a working HDD, as far as I know.
I can understand how things might get a bit overwhelming when things go wrong and you have no idea why. Happens to me all the time.

I've learned that the thing to do is to eliminate the possible causes of the problem one by one. You do that by testing. You have to start trying stuff out, run tests, be thorough. Otherwise, you will end up with a whole lot of guesses and not much else. Or, as you described above, you end up buying replacements for parts that do not need to be replaced.
You say that when you tried to run a repair disk, your PC asked you to press a key to boot from CD. Your start up repair CD works with files stored your in your HDD. It may be that the files it needs to recover your OS were corrupted, and so it was unable to complete the process. That does not necessarily mean that your PC can't run a disk check from a bootable CD, though. Worth a try. If that doesn't work, then you will at least be 100% sure there's nothing more that can be done along that route.
If you really don't think you should even attempt to test the drive at this point, then you may as well pull out the RAM you have now, drop in RAM that you are sure that is compatible with your board (be sure to check your mobo's QVL), then see if the problem persists. If that changes nothing, then go ahead and borrow a working GPU from a friend, test that on your system. If you still experience problems, then you move on to the next possible cause. It could be anything at this point (may be your PSU, in fact), so you have to be patient, or be willing to pay a professional do all that for you. (That last option is always the most convenient, in my opinion!

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Anyways, good luck and keep at it. And do check your thread for the advice of more knowledgeable members.
And sorry for the wall of text!
