Please a plea, I dual booted my system with windows 8 and backtrack, now the backtrack was working but the windows 8 refused. Now when I wanted to remove the backtrack by trying to do a fresh installation of windows,it will start but when i get to the point of selecting the drive to install windows on, it will tell me that no drive is available. my hard disk is good and working well because as of now, the working backtrack still opens but I really need to get back to windows. Please can someone help..Pls help me or recommend me to someone that can help plsssss.

Are you trying to format it by go in straight with your cd or have you booted from the windows installation disc?

appears like you have messed up the file system on your HDD. happens when you don't properly install Linux based OSs in dual boot mode with say MS windows Os. try this:
1. boot into backtrack,
2. try to partition your HDD (shrink it as done in windows os). use Gparted
3. format the new part u have 'cut out' in NTFS.
4. Reinstall windows in that new part.( u should be able to see it now).
5. but windows boot loader messes up grub, so you won't be able to boot to Linux again.
6. to solve dis just reinstall Linux to the old partition
7. Grub will see both operating systems. hope it helps.
note: its better to use backtrack as a live cd especially when you are new to the linux environment in order to avoid all these. Also u need to properly install linux . look for tuts online