A friend brought me an Hp pavillion 8240, i did a couple upgrades, one was memory and 2 was the HD, Western Digital 40gig 7200. I installed XP on it and kept her old HD as a slave. The next day she says that it gave her this error "SMART Failure Predicted on Hard Disk 0:" Press F1 to continue. It starts up just fine and works great, so I decieded to disconnect the slave and just run the master, when I do that the new error message is " Operating System not found". I plug the slave back in and we're back to the original error. So, after this long message the question is " WHAT THE @#$% IS WRONG WITH THIS THING?" All input will be greatly appreciated. Thanks in advance.