easy as 123
use dos fdisk it can be found by using run or just boot up with your windows
system disk and use command prompt
no im not going to tell you to delete your hard drive
type fdisk /mbr
this will get rid of grub
now type fdisk
using these options you can safely delete the linux partition and now you
should see one fat32 and one empty partition so you can select create dos
partition and add that in there, you can use a variety of other partitioning
tools in mandrake you can use diskdrak and get a visual view of it i think
you should be able to delete the linux partitions and then resize your
windows partition it will warn you if it says it will do any damage, as
allways back up your stuff!