When updating the BIOS on a system with BitLocker < Enabled > be aware of the below.
If the recovery key is unknown, this can result in data loss or unnecessary operating system reinstall.
BIOS revisions listed below have been found to cause an error with BitLocker where it will not enable/resume when the Trusted Platform Module (TPM) is in TPM 2.0 mode. If you have recently updated your system BIOS to the version below. Update again to the new version available on Dell Support Site to resolve the issue.
Platform |
Affected BIOS Version |
Latitude 7275 |
1.1.29 |
Latitude 5175 / 5179 |
1.0.22 |
Latitude 7370 |
1.11.4 |
Latitude E7270/E7470 |
1.14.3 |
Latitude E5270/E5470/E5570 |
1.13.3 |
Precision 3510 |
1.13.3 |
Precision 7510/7710 |
1.11.4 |
Method One: The easiest solution is to suspend BitLocker before updating the BIOS.
Click Start
Go to Control Panel > System and Security > BitLocker Drive Encryption
You can now update the BIOS (latest can be downloaded from the Dell Support Website).
Or article How to update the BIOS on a Dell System
After BIOS updated you can then Resume Protection
Method Two: Edit group policy for BitLocker.
Click Start. In the Search box, type gpedit.msc and press Enter.
Local Computer Policy should be displayed, and options for Computer Configuration and User Configuration.
Under Computer configuration, click Administrative Templates.
Open Windows Components. Click BitLocker Drive Encryption folder.
In the right pane, click Configure TPM Platform Validation Profile.
Double-click the Require additional authentication at startup policy. Set the policy for Disabled.
Click Apply, then OK. Restart the system.
Once the BIOS is updated, repeat these steps and Reenable BitLocker.
Method Three: Edit group policy for BitLocker.
Click Start. In the Search box, type services and press Enter
Scroll down and double-click BitLocker Disk Drive Encryption Service.
Under General Tap on the open window, next to Start up type click the drop-down box (manual) the select Disable
Under Services Status, click Stop.
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