I have purchased an external seagate 1tera byte USB hard drive, and connected it to my computer using windows xp. I have been using this for over 6 months and have transfered over 600gb of data. I used to save and access personal data from the external hdd. One day my windows suddenly showed a blue screen with NTFS error. Next time I started the computer though, it would simply crash and reboot automatically. this goes on in a loop forever. I unplugged everything and then added them one by one until I found out that the computer crashes everytime I turn on the power to the external usb hard drive. When I boot up windows without the drive it loads up fine, but as soon as I turn on the hard drive, the computer begins to recognize it and then gives me the blue screen of death for about a second and moves right into rebooting. Can you please let me know if there is any hope or if I have lost all my data and need to reformat the external usb drive. thank you for your help.

Check Device Manager for Yellow "!" or "?" on the Usb Systems. Try plugging the HDD into a different USB Port. It's self powered so you needn't worry about finding a Powered USB Port. If the Same thing happens it's most likely something in the External drive, not necessarily the HDD. Contact Seagate Support, the Unit should still be under Warranty. There is nothing to learn from someone who already agrees with you.