The problem is, I put in this already used harddrive into my computer after the old one fried. Now, when I start the computer, I get kicked to an error screen that tells me to start my comp in safe mode, which is fine. Except when I do so, it just re-loads like I just turned on the computer. Now, I know the hard drive is GOOD, Used it on another comp before.
How can I get around this, I tried to use a windows boot disk, didn't work. Tried to load in the other options on the screen which included "Normal mode, Safe mode with COMMAND prompt, Safe mode with network, and last working settings." When i leave the thing alone and just let it do it's count down, it still isn't loading windows. It acts like it is going to for a sec, the window XP logo on the front page comes up, then it kicks me back to re-load.
Someone with more sense then me, please help.most likely a problem with the hardware settings being changed (from the old comp to ur new one). u need to reformat ur new hd.I had THOUGHT of that, but I don't get my product KEY for my XP pro till tommorrow and I am impatient. But thanks for the advise. And I am sure that is exactly what is wrong with it, and tommorrow when I get my key, it will all be over and done.patience is a virtue...

......whatever the *censored* "virtue" means.lol  Old hard drives stuck into a new computer usually causes problems.

Check the BIOS to see if it is being recognized properly. Recheck all jumpers.I swap HDDs around all the time, and mostly they work fine it looks like you need to reinstall windows , and like GX1_man Says

you need to make sure that your bios has the settings for the new HDD, and on most bios'es HDD info is on the frist page, just set them all to auto configer and then redetect and it should be fine