Verify Bios Mode/Boot Environment Mode in Windows 2008

Typical way is to run msinfo32 and from the start menu but most of the time the information was not there.

Here is the other way round.

1. Check this file : C:\Windows\Panther\setupact.log

2.Launch Control panel - Administrative tools - Computer management
Check Disk management tab. You should have EFI Encrypted partition (around 100mb). Also, when you right-click your HDD, on the Volumes tab you should see GPT partitioning, (not legacy MBR).

The GPT is part of UEFI package