With certain specific combinations of BIOS versions and graphics cards from various vendors, installing SafeGuard Device Encryption may lead to an inaccessible machine if the original vendor's graphics card driver is (temporarily) replaced by the standard VGA driver of Windows Vista or Windows 7. This may occur in the following scenarios:
- Automatic graphics driver updates
- Booting Windows in Safe Mode
- WinPE recovery environments
- WinRE environments
Known to apply to the following Sophos product(s) and version(s)
Sophos SafeGuard Disk Encryption 5.60.0
SafeGuard Easy 5.60.0
SafeGuard Device Encryption 5.60.0
Windows Vista, Windows 7
Who can be affected
While this issue was originally detected on Lenovo machines, it is not tied to this hardware, and machines from other vendors running Windows Vista or higher may be affected as well.
What To Do
Sophos have produced a patch that will prevent this issue occurring on a client machine. You should install this patch on computers that have the potential to be affected because of their BIOS/graphic card combinations. A list of these models/BIOS versions are listed in Knowledgebase article 113426. The installation usually takes less than a minute.
The patch is available for the following versions (32 and 64bit):
SafeGuard Enterprise 5.50.6
SafeGuard Easy 5.50.6
- To download the patch go to the SafeGuard download section of the Sophos website.
- On computers that have the potential to be affected, because of their BIOS/graphic card combinations, install the patch for the corresponding version.
The patch consists of an msp file (Microsoft Installer Patch File) for the SafeGuard Enterprise Device Encryption module which is part of the client package and additionally a batch file that installs the patch and updates the Lenovo Rescue and Recovery environment if required (Update_SGN_5.xx.x.x.cmd). If you do not have Lenovo's "Rescue and Recovery" installed, using the batch file is optional.
For detailed information on how to apply an msp file, refer to the knowledgebase article, SafeGuard: How to apply a Windows installer patch to a SafeGuard product
Please note: The patch is integrated as of version 5.60.1 of the following products: SafeGuard Enterprise, SafeGuard Easy and Sophos SafeGuard Disk Encryption.