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BitLocker activates automatically on a fresh installation of Windows 10 version 1803 (April 2018 Update)
技術的な記事 ID:   KB90524
最終更新:  5/4/2018

環境

McAfee Drive Encryption (DE) 7.x

Microsoft Windows 10 version 1803 (April 2018 Update).

For details of DE supported environments, see KB79422.

問題

BitLocker automatically activates immediately after installing a fresh Windows 10 version 1803 (April 2018 Update) and McAfee Drive Encryption is not deployed on the endpoint.
 

原因

BitLocker automatically activates when the vanilla (gold) image of Windows 10 version 1803 (April 2018 Update) operating system image is installed on the drive.

解決策

Scenario 1 - Fresh install of the operating system when McAfee Drive Encryption is not deployed on the client system

Customers are impacted on all fresh installations (media or OEM image) that first install Windows 10 version 1803.

To prevent BitLocker encrypting the drives before rolling out DE, see the following Microsoft article.
https://docs.microsoft.com/en-us/windows-hardware/design/device-experiences/oem-bitlocker#disable-bitlocker-automatic-device-encryption

NOTE: If BitLocker activation was not prevented, you might encounter the issue discussed in KB81952 (Client always shows the System State as Inactive when BitLocker is installed via the command line).

解決策

Scenario 2 - Upgrades to Windows 10 version 1803

Customers are not impacted on upgrades from an earlier version of Windows 10 to Windows 10 version 1803, because the system is already encrypted and activated by DE.

解決策

Scenario 3 - Upgrades to Windows 10 version 1803 using the operating system refresh method

Customers are not impacted who update their systems to Windows 10 version 1803 using the operating system refresh method outlined in the guides below:
  • PD24855 - Drive Encryption 7.x Windows OS Refresh Process Guide for UEFI Systems Only
  • PD24854 - Drive Encryption 7.x Windows OS Refresh Process Guide for MBR Systems Only

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