How to Fix Windows Cannot Verify The Digital Signature For This File
As a part of the system startup procedure, the BOOTMGR boot loader introduced in Windows Vista and subsequently used in Windows 7, Windows 8(.1), and Windows 10 reads boot configuration data and displays the operating system selection menu. Sometimes, however, when a user installs a newer version of Windows on a top of already existing older one, or installs a service pack, the BOOTMGR entries are not updated properly, and the following message appears:

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Since the boot error is often caused by an outdated BOOTMGR, replacing it with the correct version is often a good and effective solution.

Here are the steps to replace the BOOTMGR:

Boot your computer with Windows Installation DVD and from Windows Recovery Environment (WinRE) start the Command Prompt.

Type below command into Command Prompt and press Enter key.

Code:

Bcdboot  C:\Windows  /s  D:\  /f ALL


Where C:\Windows is your Windows installation folder and D:\ is your active system boot partition.

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When computer boots into Windows Recovery Environment (WinRE) environment the drive letter assign to Windows partition may not be C: drive letter because Windows 7, 8 , 8.1 and 10 creates a separate system partition when it's installed from scratch. The system partition contains boot files WinRE assigns the system partition the C: drive letter and the Windows installed partition will be assign any other drive letter usually D: drive letter is assign to Windows installed partition. The Bcdedit /enum | find "osdevice" command can be use to find out the drive letter of the Windows installed partition the output of the Bcdedit command is similar to this osdevice partition=D:. The drive letter after partition= is the drive letter of the Windows partition.


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