How to back to windows 7 from ubuntu?

I’m trying to get back to windows 7

EDIT:
i put my windows 7 disc and press F12 to select disc, but after that computer spin disc like something try to do, but nothin…
i tried on different computer disc and there works…

i find on google just articles how to make dual-boot or to unistall ubuntu when there is in same time windows installed
but didn’t succeed to find right way to unistall ubuntu
and then to install windows 7

had ubuntu 12.04


last tried and get locked

i open gParted in live ubuntu cd
format every partition i find except usb-drive
format it all to one node that is empty
format that node to ntfs

and when i want to start my windows 7 installation i first got grub-rescue

then i tried to fix mbr via command line in live ubuntu cd

and now whan i click in my boot section via F12, there is not grub-rescue
instead of that i got some yukon messages like
Operating System not found…

And before that
not active partitions…

Computer is fuijitsu simens amilo pro v3525

Its very easy, main thing! First install Window7, and after Ubuntu.
For example you got 250Gb hard drive
During install window made 500mb windows boot and abt 100gb windows, delete boot and start installing.
Than install Ubuntu along with Windows7, even in automatic mode you will get dual boot without any problem.
In your case probably if you download something like Grub Rescue Iso - it will recovering all possible boot records.

i find on google just articles how to make dual-boot or to unistall ubuntu when there is in same time windows installed
but didn’t succeed to find right way to unistall ubuntu
and then to install windows 7

i don’t need dual boot


I succeed to install just windows 7, my mistake i didn’t till now post is that i succeed with installation
It was with cd, with first cd it works on diff computer but on this i need to install didn’t
but then i change cd and succeed