Need to fix Windows MBR without using a CD

Solution 1:

Do the following

  1. Start a cmd shell running as administrator (Start / Search / cmd / right-click Run as Administrator)
  2. Type bcdboot c:\windows

That will re-write the MBR and so remove grub and re-install the Windows loader.

Solution 2:

A very easy solution would be to download and install Visual BCD Editor.

The tool comes with "Dual-boot Repair" utility. Run it and click "Automatic Repair". Confirm.

That's it ! You can reboot to Windows 7.

Explanation: The automatic dual-boot repair will (re)create Windows 7 MBR and PBR (master and partition boot record) and reset/repair the Boot Configuration Data (BCD) store to default values (e.g. timeout 30 sec., Windows 7 as default loader).