They were bought by Maxtor and then Seagate took over Maxtor. You might try the Seagate site to see if the Quantum Diagnostics disk is still available. I have one of these floating around somewhere. It was a downloadable that made a boot disk for you. Anyway, you can always try the basics by removing and reinserting the power and IDE cables..or replace the IDE cable if you have one. If the drive is detected but won't boot, you could attempt a repair installation from the Windows CD. If no go, the drive isn't worth messing with. Hopefully you've backed up what's important because retrieval by third parties who do this will be an arm, leg and kidney. Good luck.