Guys i need your help..

.my problem is my hard disk,i transfer my HD(maxtor) to my finernd pc to share some files...now when i use my HD in my own PC the problem occurs...my pc cannot read my Hard disk and error message prompt...and now the worst is..when i use my HD in other pc as SLAVE...i dscover that all my files in the main drive which is the drive C are not present but in the other drive the drive D: all files are intact...what happends to my drive C

and how come my HD(drive c

) have concume a space the same before when it has a files and programs intalled...Guys I need your help...i want to recover my files on that drive...can you help here Guys?please...i really need my files...its half of my life.. :cry: :cry:
please help me about ds..
Thanks and Gob Bless you all!!