Can't open my Toshiba external hard disk

I have a Toshiba external hard drive and my computer is windows 7 ultimate.
when I connect my external hard drive to my computer, external hard drive light up and moving.
The external hard drive still appears in Computer and in Disk management.
But when I double click it or right click on it, my computer stop working.
When I try to open in Disk Management, its fail too.

Plz, help me.
 

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DON'T attempt to open it - - instead,
logon as Administrator
launch CMD
enter CHKDSK D: /F
 
When I open it on my computer, its freeze (shown in a photo)(I can do other things besides that.) if unplug Hard disk, its work again.
 
Hi Like @jobeard suggested. "Don't open it" If it's bad; It can cause your PC to shut down. If you run a chkdskD:/F like suggested, you might be able to fix the drive. Have you always removed the drive safely??
 
Hi Like @jobeard suggested. "Don't open it" If it's bad; It can cause your PC to shut down. If you run a chkdskD:/F like suggested, you might be able to fix the drive. Have you always removed the drive safely??
Thz, I will try that again. I always removed the drive safely (but after hd broke, I can't - even if I want)
 
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