Remove Win7 BootLoader

Windows 7 did not support to ZTE ADSL modem so removed Windows Seven Boot Loader form a PC. it works well and now restord xp boot loader.
Steps to remove windows 7 boot loader.

put windows 7 dvd to DVD Drive
Start command prompt and give this code
D:\boot\bootsect.exe /nt52 ALL /force

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\>D:\boot\bootsect.exe /nt52 ALL /force
Target volumes will be updated with NTLDR compatible bootcode.

C: (\\?\Volume{9546ffe8-57f9-11de-9e43-806d6172696f})

Updated NTFS filesystem bootcode. The update may be unreliable since the
volume could not be dismounted during the update:
Access is denied.

E: (\\?\Volume{1f344acc-57f9-11de-afe5-806d6172696f})

Forced dismount complete, open handles to this volume are now invalid.

Successfully updated NTFS filesystem bootcode.

\Device\HarddiskVolume2

Successfully updated FAT32 filesystem bootcode.

Bootcode was successfully updated on all targeted volumes.

C:\>