I got a 40 GB hard drive for my HP with Windows XP. I have never installed one before so I don't really know what I'm doing. I have a 3.5" disk case with a space open (there's the original hard drive and the floppy disk drive) so I took the case out and put in the new hard drive. I didn't do anything to the jumper cables because it looked like it was in the right spot.. Code: * * |*| * * * |*| * * I checked my manual for the computer and it said to make sure it's in the CS position, and I think that's what it is, right? So the next thing I did was put the drive cage back in. It said connect the power cable to the new hard drive. I have no idea what that is, so I took a multicolored four pronged thing that was sticking out of the place where it looked like the power was going (also every other drive has one of these in it) and plugged it in and it fit. The next thing the manual said to do was to connect the part of the cable that said "master" to the original hard drive and the part that said "slave" to the new HD. I didn't see any marking of this on the cable so I left the part that was plugged into the original hard drive plugged in and saw that halfway through this cable was a place where you could plug it into something. So I assumed this was the slave part and plugged it into the back of my new HD. The reason why I couldn't use the packaged ATA cable is because there is only one slot on my motherboard (currently being used by the old HD). So I started the computer up and as all the startup programs are starting up there's an icon that says "new hardware found - maxtor drive" or something. Then as soon as everything's up, it restarts. I let it go through again and it did the same thing. So it looks like it starts up, then as soon as everything's loaded, it automatically restarts. Can anyone help me with this please? I'm going back to school tomorrow and I want to get this done so I know I'll have my computer ready when I get back, and also..i still have to pack! Thanks a lot! edit - I just went into the BIOS and it recognizes the drive as the "Primary Slave" drive and recognizes it as a 40 GB HD and it looks good from what I can tell, but the computer still reboots every time I start it up.