"hardrive not detected" means i can't repair my computer

IDE
SATA

I know this sounds crazy, but hear me out. I did this long ago, and it worked. Take your hard drive out, and put it in a ziploc bag, and stick that sucker in the freezer. Yeah I said it, freezer. Take it out after an hour and try it again, and back up what you need to keep onto another drive. I used that trick a couple of times, it worked for me both times. Make sure you put it in a ziploc bag or something similar to prevent condensation. Let me know if it works for you man.

EDIT: I forgot to mention, there is a company called Hard Drive Recovery Group that can repair a physically damaged drive. It's pretty cheap, and if they can't help you, there is no charge. Here is a link if you are interested: http://www.harddriverecovery.org/hard-drive-data-recovery.html

I was asking a question. I said that a clicking noise would be a sign.... meaning a prediction... It's too late for that if the HDD has already died.

If the HDD has died, basicly your only choice is to buy a new one, and reinstall everything from the CD's you have..... and forget about whatever was on the old HDD....it's gone. It's gone unless you're willing to pay for software recovery, which won't be cheap, nor quick.