You say the hard drive's in an old computer, but you don't say HOW old. You say you think it's IDE but you aren't sure. So the first thing you need to determine is whether it's IDE or SATA. Take the cover off of the old desktop and look at the cables going to the hard drive. One will be a power cable, but the data cable is the one to look at. The IDE drives use a flat 2" wide cable, the SATA drives use a much smaller cable, just over 1/4th inch wide. Once you determine which you have, you can invest $25 or so in an enclosure to put it in. Then you just plug the enclosure into a USB port, Windows will assign a drive letter to it, and you can access your data just like you would with a flash drive.
I'm not really sure what to do, i have a hard drive from my old desktop computer and i want the files off of it. Im pretty sure the hard drive is an IDE? I don't really know anything about hardware and such.
My new computer is a windows 8 laptop, can i use something like THIS? If not what should i use?