Yep, Bitlocker is only available on Ultimate - TrueCrypt is indeed the other good alternative, but whole drive encryption can be a tricky business.
TrueCrypt - Free Open-Source Disk Encryption - Documentation
What do you mean whole drive encryption can be tricky? I'm fixing to attempt doing just that!
My Computer
- Computer Manufacturer/Model Number
- Shuttle XPS (barebones)
- OS
- Windows 7 Ultimate 64bit SP1
- CPU
- Intel Core 2 Duo 3.33 ghz
- Motherboard
- Shuttle FG41
- Memory
- 4GB DDR2
- Graphics Card(s)
- on board
- Sound Card
- on board
- Monitor(s) Displays
- 26"
- Screen Resolution
- 1920 x 1200
- Hard Drives
- WD Caviar Blue: 320GB 7200rpm 16mb cache
- PSU
- Elan Power (Shuttle)
- Case
- Shuttle XPS
- Cooling
- Shuttle & Intel
- Internet Speed
- 30mbps/4mbps (avg. actual speed)
- Other Info
- Main: [ Mac Pro (2008) w/two 3.2 GHz Quad Core Xeon :|: 16 Gb Ram :|: 2 x 40Gb SSD & 2 320Gb HDD ]