Hi rajaram_s !
Have you installed Linux or Boot Loader of any other OS in your Hard disk earlier? Third Party Bootloaders are main cause of this problem most of the time.
I would suggest you to boot up from
SuperGRUB CD/USB/Floppy and select
Fix Windows Boot Loader option. Windows Installation CD will definitely work after that.
http://www.supergrubdisk.org
If you have LiveCD of any Linux distro then execute this code in Terminal/Konsole of LiveCD :
Code:
sudo dd if=/dev/zero of=/dev/sda bs=512 count=1
*** Please note that
dd command will
wipe out your Hard disk including partition table and boot loader details. Your Hard disk will be blank as brand new one.
Windows Installation CD will work fine after executing
dd command.