CD-Lock requires Windows 2000, XP or Vista. Media protected by CD-Lock also require Windows 2000, XP, or Vista for automatic background decryption. Win 98/ME users can use the disks but will have to decrypt the files first. This full function trial version lets you evaluate CD-Lock for 15 days without obligation. Should you decide to use CD-Lock beyond the 15 day trial then you can purchase it for a very reasonable $29.95 Please click here to download CD-Lock. You can either save the file to disk and run it later, or just "Open" it now. Thank you.