Deleting a Linux Partition

Ok so I now have 2 operating systems, windows and linux. I haven't used the linux in 1 month so I would like to remove it.
I was so proud I got it installed properly but now I cannot remove it.

Back then, I made the partition with Partition Magic. I tried removing the partition with the "Remove Partition" tool from Partition Magic.
Everything went well so far. I applied the changes. So my system is rebooting. After the reboot (from here everything goes bad) I get this black screen that says:
GRUB
and lots of commands.. I had to press TAB to get a list of all available commands. Since I don't have a program to screenshot there I don't have any.

I tried lots of things. After a while I gave up and booted from the DVD that has linux on it. And reinstalled it over the old one. Now everything goes fine. Windows slowed down a bit, but whatever. But PLEASE help me.

How do I remove the partition and get 1 disk again.

To those who want to help, thanks! To all the others, also thanks!

Highest regards !

soFly

Thanks, but windows is already installed, if I add my windows cd and install it? All my files will be gone?

You can either boot from a win98se boot floppy or boot floppy disk image and run

fdisk/mbr

OR

boot from a Linux rescue CD

delete the linux partition, create a new 128MB partition in it's place and create an ext3 FS on it then:

fdisk -l /dev/hda # will print out your partitions

fdisk /dev/hda # /dev/hda = primary master PATA HDD /dev/sda = 1st SATA HDD

# in fdisk
# p = print
# d = delete partition
# n = create new partition
# w = write
# q = quit
# m = help
# l = partition types

If you make a mistake DO NOT hit w to write :!:
just quit and try again

# hit p to print the partitions
# hit d to delete the linux partition
# type in the partition number of the linux partition (type 83)
# hit n to create a new partition
# hit enter at all the prompts except when prompted for the partition size
# type in +128M for the size
# TYPE is 83 Linux native

If you make a mistake DO NOT hit w to write :!:
just quit and try again

fdisk -l /dev/hda # will print out your partitions

when you are done with fdisk

mkfs -t ext3 /dev/hda? # where ? is the partition number of the 128MB linux partition you made

mkdir grub
cd grub

echo 'title dos
rootnoverify (hd0,0)
chainloader +1
' > grub.conf ;

sync

shutdown -rf 0

Will my windows also be deleted?

Thanks for the help ! You rock