Acer Laptop Full Disk Encryption compatibility
When starting Full Disk Encryption on an Acer machine you may find that the DESlock+ Safe Start process is unable to complete and reports that a problem was detected.
In order to use DESlock+ Full Disk Encryption with GPT partitioned disks the system must be configured to use UEFI boot mode.
Some Acer systems come configured from the factory to use Legacy boot mode. This is in order to allow downgrades from Windows 8 to be performed. This is detailed in the Windows 8 Disclaimer section on the Acer website:
"To enable downgrade to Windows 7 on this system the BIOS settings on this system were changed to boot into legacy BIOS mode."
More detail can be found on the Acer website here: http://www.acer.com/disclaimer-downgrade-windows8/en/index.html
In order to resolve this the Boot Mode of the system will need to be changed.
The following steps apply to Acer machines that are using Windows 7 x64 and GPT formatted disks.
Checking System Configuration
Firstly check if the drive is formatted using GPT:
Adjusting BIOS Settings
If the disk is partitioned using GPT then the following steps can be attempted on the system.
Note: It is important that a full system backup is taken before using the following process.
System starts Windows
If with the settings above in place the machine is able start and load Windows correctly then you should be able to perform full disk encryption as normal. You should have a current backup of the disk before commencing the encryption operation.
System does NOT start Windows
If with the settings above in place the machine is not able to start Windows, then you will need to revert the changes made to allow Windows to load again. Set Boot Mode back to Legacy and enable Secure Boot. Please note you will need to supply the BIOS password you specified earlier in order to enter the BIOS to modify the settings.
In order to encrypt a system that is not able to start with the Boot Mode setting set to UEFI there are two possible options:
1. Upgrade the system to Windows 8, setting the Boot Mode setting to UEFI once installation is complete. You should ensure you have made a copy of your data and applications from the system before upgrading so that you can restore them after reinstallation.
2. Reinstall Windows 7 from Windows 7 media with the Boot Mode set to UEFI and Secure Boot set to Enabled (optional but recommended). You should ensure you have made a copy of your data and applications from the system before reinstalling Windows so that you can restore them after reinstallation.
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