Windows won't boot after removing hard drive

Thanks for your reply. I did, the BIOS recognises the hard drive and it is the booting drive, but I am still having the same problem.

The only thing I am thinking off now is to get another hard drive and do fresh windows install on it and add the old hard drive as a second hard drive, however this might also not work because the PC might request me to format the second hard drive as well.

Any other suggestions are much appreciated

Thanks all for not helping me at all!

However, I was able to find a solution after almost flying to the sun with this problem

First: the problem: The hard drive went from NTFS format to RAW for some reason, I think the other PC being an old PC was not able to recognize it because its limited to 2TB and the HDD in question was 3TB.
It seams that the PC in an attempt to recognize the 3TB HDD decided to destroy the partition table and thus the HDD file system became RAW

Second: Solution- I managed to recover all user data from the HDD to an External HDD using program called iCare Data Recovery, the best thing about this software is the ability to recover partitions which meant all my recovered data was in order. please note Recuva won't work in this case because the drive is RAW.
after that, it seemed that formatting the hard drive was the only solution to bring it back to NTFS state..
After days of research I came across an old thread by the user dEAne, it seemed that the solution is to recover or rather rebuild the partition table of the HDD using testdisk, which sorted the problem and the drive is back to NTFS without format.

All credit to the user dEAne

http://www.tomshardware.co.uk/forum/263779-32-change-file-type-ntfs

Here is dEAne's post to the thread "Change file type RAW to NTFS"

"
There are two places where we store file system information: the MBR partition Table and Volumes boot sector, When the file system information provided on these 2 sectors of disk is not good you may see chkdsk reporting raw file system (though the data is still there).

Ok try this one mount the drive as a slave inside the computer and see if you can repair the partition table:

Download the Windows version of TestDisk. http://www.cgsecurity.org/wiki/TestDisk
Unzip the downloaded file to your C: drive and open C:\testdisk-6.8\win > double click " testdisk_win" (the program doesn't have to installed).

A. At the first window select “No Log” and press the <Enter> key.
B. Select what drive to analyse, choose “Proceed” and <Enter>.
C. Select partition type – Intel if it’s a PC.
D. Select “Analyse” then <Enter>. The drive/partition will be analysed.
E. Select “Proceed” at the next screen, then <Enter>.
F. Press “Y” if the partitions were created under Vista – “N” if not.
G. TestDisk should say “Structure OK”. Choose the drive/partition to fix. Then press <Enter>.
H. Select “Write” and press <Enter>.
I. Press “Y”.
J. Press <Enter> and close TestDisk. Reboot the computer.
"

I have tried booting from the CD and selecting repair, it didn't work, I think the problem was older motherboards have issues with 3TB HDDs and therefore destroyed the partition table and the HDD became RAW, only TestDisk was able to rebuild it without having to format

I am not an expert in this but I just learned the very hard way!