hey guys i really need help at my computer i really fucked up in the boot stuff...it seems that my Drive C turned into Drive D....It happens when i tried to test an old Hard Drive when i hooked it up on my PC after that i tried to install a Windows XP Sp3 on that drive but then the hard drive failed on the installation process and now When i boot i can boot to the original HDD that i have and it just turned D into C...the old HDD is fine now cause i hook it to another PC now the problem is my original HDD wont boot because it turned into DRive D i need help guys and also i put the windows XP cd on the Original HDD and try to Delete the drive C because it said that its System Reserve and now it just wont boot...how do i fix it? or any idea how to change the drive Letters?