Windows does not boot after using the Ubuntu installer

[amar]

Installed Xubuntu alongside Windows7, choosing to put the bootloader on sda1 (Windows). After reboot, Xubuntu loads ok, but Windows fails to boot.

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for further info
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Details mailed to boot-repair devs:
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I installed Xubuntu with Windows 7. Earlier I had Ubuntu on 30GB partition. Deleted the partition and installed Xubuntu on 20Gb, 10GB is unallocated.
I am afraid, while isntalling I chose to install Grub on "hda" or "dev/sda1"->[Win7] rather than "dev/sda2".

Now when I try to boot into Win7 from Grub menu I simply return to the same Grub Menu without any error message after few seconds.
Tried boot-repair:

Before fix:
http://paste.ubuntu.com/1251480/

After fix:
http://paste.ubuntu.com/1251484/

But the issue still exists.

[YannUbuntu (yannubuntu)]

The problem is that you installed GRUB stage1 in the PBR of the Windows partition (sda1), this breaks the boot of Windows.

To fix it, please follow this tutorial: https://help.ubuntu.com/community/BootSectorFix
If this doesn't work, you will need to use the "fixboot" command from a Windows Repair CD (https://help.ubuntu.com/community/WindowsRecoveryCd).