External hard drive not recognized

Hello,

my external hard drive is not recognized. I can see it at Device Manager and BIOS. Its lighting when conected. I CANT open Disk Management while its plugged into computer(somehow i cannot even start computer while its plugged). Sometimes i can see this hard drive in windows but its empty it doesnt have name, and i cant open it of course.

I also tried plugging it directly through SATA but its the same.

Can u guys please tell me what should i do to recover my data?:(

Sorry for my english

edit: I ran HIRENSBOOT mini widnowsXP but drive was still not recognized. I was trying to recover files with Recuva but it didnt work(had to unplug external hard drive to make this program open). I noticed that i cannot run any hard drive detecting program while my external hard drive is plugged. Any ideas?