Repair windows after unstalling ubuntu

if you installed ubuntu side by side with Windows
then you removed The Ubuntu OS you will not be able to access to your windows
and this because you now removed the boot loader (grub boot loader) so to repair your Windows OS just follow this steps

for Vista:
just insert your Vista CD and Choose repair

For XP :
insert XP CD and choose repair, you will asked to choose location to run DOS command from it usually C:\Windows
after the command prompt opens just write this single word FIXMBR

and restart your system, it should works ok now