Flash-Lock requires Windows 2000 or Windows XP. Media protected by Flash-Lock also require Windows 2000 or XP 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 Flash-Lock for 30 days without obligation. Should you decide to use Flash-Lock beyond the 30 day trial then you can purchase the Lite version (personal use only, flashdrives only) for only $14.95 or the full version which also protects CDs, DVDs, and floppies for a very reasonable $29.95  This download contains both versions. You can evaluate either or both during your 30 day trial period. Please click here to download Flash-Lock. You can either save the file to disk and run it later, or just "Open" it now. Thank you.