Things to do firstly----*********if there is any files, pictures, documents that u want to save if something goes wrong do it now before you try anything else******* for that you can buy a enclosure from any retail shop for ur specific hdd 3'5 for desktop hdd(the one with pins are EIDE or PATA/ and the one without pins is SATA.) reminder for laptop you will look for 2'5 inch enclosure. And after you buy enclosure you put the hdd inside it, and it comes with a usb plug that can be plugged in to another computer for backup. So back it up and return the enclosure within return time which should be couple of days(u can make sure when you buy it).i think ur hard drive is bad(if it is a new hdd then it requires a format, if it is a old one usually it means it has gone bad)..tara to find out after that u can try to format. if you cant format then its bad. ani u can buy another hard drive on the side. format it, transfer the backup. ani pheri if u dont want to suffer like this..buy another hard drive ani **clone the hdd using acronis true image, which is very easy to use**..yo chahi in future kei bhaihalyo bhane euta drive always there ready to be used... Cheers and enjoy.Jai Nepal