Restore MBR without cd installation

1. To download it, "http://neosmart.net/EasyBCD/". The link to download it for free is all the way at the bottom of that page, so scroll down and click on the “Download free for limited, non-commercial use” link. After the download, install it as you would any other Windows application.
2.To restore Windows 7’s boot loader to the MBR, click on the BCD Deployment tab.
3.click on the Write MBR button. If you are running Windows XP, select the option under MBR Configuration Options
4.If successful, a message at the bottom left of the window will say "MBR written successfully".