Does CDE not support windows 7 (32 & 64) yet ?
From the website:
Comodo Disk Encryption 1.2.114847.152 - System Requirements
Operating Systems
* Windows Vista (32 bit and 64 bit)
* Windows XP (Service Pack 1 or later) (32 bit and 64 bit)
* Windows Server 2003 (32 bit and 64 bit)
* Windows 2000 (Service Pack 3 or later) (32 bit)
Hardware
* Intel Pentium II 233 MHz or equivalent processor
* 128 MB RAM
* 12 MB free hard drive space
Secure Hash Algorithm and Message-Digest algorithm 5
MD5 - 56DA3FB809C619963AAACBD14C5FEF35
SHA1 - A97FBB96E5B6C7E2E35A1FF4838C1304637F7F29