Converted a FAT32? To NTFS, How do i convert back ?

[fhe92]

Right,

I was doing a machine for a friend of mine,

Basically he wanted his information from his C drive of his old machine onto his new PC

I didnt have a USB to IDE / SATA cable at the time, So i just plugged the drive direct into the board via IDE cable,

I then changed the drive in the Disk managment to allow me to get into the drive and take information from it,

Now he wants the drive back in his old machine, I tryed to reboot with the old drive back in his machine and it blue screens before it gets into windows.

Please pleaseeeee

Help me

 

[fhe92]

I clicked ' Mark partition as active'

And then now I cant change it back to a bootable drive....