Firstly, you really need to read up on how to post smartly in this forum.
EDIT: reply asap please.. Urgent!!
The above will not help you get a response quicker - this will most likely result in members not wanting to help you.
I can barely understand what you're trying to say; and the sequence of events that has led to your problem.
From the bits of information you've provided; from what I can understand; you've destroyed your Linux installation and overwritten it with Windows Vista. It seems though that you have a separate /boot partition with GRUB thus allowing you to boot into Ubuntu - the fact that you have no Ubuntu installed; is why you get the "Filesystem not Found" error.
If you want to boot Windows; my advice is you insert the Windows Vista disk; and do a clean install and wipe everything on your drive.
Until you provide more information I can't help you any further.