When installing Windows, the installer will only update the boot sector of the system (booting) partition. This happens because the partition's boot sector code contains the default BootIt BM code and not the code required to boot into Windows. Press any key to run the BIOS bootstrap loader. If you are about to install a new OS then insert the This partition does not contain an operating system. Attempting to boot Windows 7 results in the following error:
The booting files are moved to the Windows 7 partition and it's set active. Later, the user needs to remove the first partition. Windows 7 is installed normally to the second partition, placing its booting files onto the first partition (similar to the default method used by Windows 7 when installing to an unpartitioned drive). Scenario 2: Using BootIt BM as a partition manager, two NTFS partitions are created and formatted for installing Windows 7.Note: This type of problem can be avoided by formatting the destination partition(s) as part of the installation process. This happens because the partition's boot sector was not updated when Windows 7 was installed and still contains the XP code to load ntldr (Windows Vista and later use bootmgr). After moving the files and attempting to boot into Windows 7, the following error message is displayed: Later, the user installs BootIt BM and decides to move the Windows 7 booting files to the Windows 7 partition to separate it from XP. Windows 7 was then installed using default options, placing its booting files onto the XP partition in a standard Microsoft dual-boot configuration. A new partition was created and formatted using XP to install Windows 7 in a dual-boot setup. Two example scenarios that can cause this problem and the resulting error messages are described below: Since the Windows installer updates the boot sector of the system partition during installation, this problem usually occurs when the Windows booting files are relocated from their install partition to an alternate partition or when installing an older version of Windows on a system with a newer version already installed. When the Windows system (booting) partition's boot sector is corrupted or otherwise contains invalid code for the version of Windows on the partition, it must be repaired before the partition will boot properly.
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