I have installed Back Track as an dual boot with windows 8, i am selecting which OS to boot from GRUB.
But now i wish to remove BackTrack Completely and convert my ext2 drive into NTFS.
I have installation media of both OS's.
What should i do?(i.e how may i remove)

just reformat the drive / partition(s).
the same as you would for any other operating system
and reinstall the windows bootloader

1. Boot from your Windows 8 DVD, choose the computer repair options and let it repair the bootloader.
2. Boot into Windows, start the Windows partition manager.
Now you have two options:
a) Remove the Linux partition(s) and extend the Windows partition into the free space.
b) Keep the Linux partition(s) and format them with NTFS.

The Windows partitioner is able to do both.

If you need more help let us know where you are stuck.

Sorry to annoy, but yesterday i have done the 2nd step without doing 1st step. Then Windows did not formatted that drive, it just said not enough memory!
and when i restarted the system there comes the Devil and don't boot with my any Version of windows CD(i lost my 8 so i tried 7 and xp).

So i was forced to install BT once again!

now my question is, is it still safe to do that? I am desperate get my 100GIg back as well as not ready to loose windows Data

I use the Gparted live cd to do most of my partitioning and reformatting jobs
http://gparted.sourceforge.net/

BT ( Ubuntu 10.04 ) used "ext2" partition format for the MBR where it put GRUB ( replacing the MS windows bootloader)

There is NO windows OS that can read a NON Microsoft ( owned,patented, copyrighted) drive formats
-- yes there is fat16 and 32 ( long name conversion is MS's )
the win 7 dvd can not read the partitions that bt was on , nor can it read the MBR

so it can not fix the mbr until it is formatted to NTFS
( the NTFS format IS owned,patented, copyrighted by Microsoft )

however even if the win7 dvd can not read the partition bt was on
it should be able to reformat it to NTFS ? maybe ?

this is why it is normally a good idea to NOT use MS's tools , except for working on ONLY the Microsoft operating system

BUT the win7 dvd might not be able to install the win8 bootloader
for that you will need a win8 install dvd

Long story short on my adventures with doing things ass backwards, (Not fixing the Windows Bootloader before uninstalling Linux).

http://forum.vectorlinux.com/index.p...97345#msg97345

Is it possible to format the drive from ext2 to NTFS using Ultimate-Boot-CD?
if yes, how?
Please help me i am desperate to kick out BT from my lappy.
I am planning to install debian and Mint on my Desktop but more than that i want to get rid of BT5 from my laptop

You meant to say that it is possible if i have my Windows8 DVD right??

I used the dd command to wipe the ext2 file system and grub but leave the boot partition intact.
Gparted as John VV suggested can reformat that ext2 partition into ntfs.

You can get gparted and a lot of other repair tools included in a a live iso of http://partedmagic.com/doku.php#.Ucw1FhVAZRQ
More info on Parted Magic at http://distrowatch.com/table.php?dis...on=partedmagic

You'll want the Windows Version of the Ultimate Boot CD. Not the Linux version
http://www.ubcd4win.com/
http://www.ubcd4win.com/howto.htm

I was poking and hoping fixing My wifes laptop. I am not Windows proficient so I had to do a full day of research to figure out how to restore Windows MBR seeing that Hirens is now kinda unavailable (I could not get it to download. Maybe you will have better luck than me).

http://www.hiren.info/pages/bootcd

Video for using Hirens if you get it downloaded and burned

Thanks for your Support honestly.
I used EasyBCD tool to fix MBR and use windows partition management to reformat drive into NTFS.
Thanks for your interest...