Are there any .zip archives that NXPowerLite cannot process?

NXPowerLite > Pre-Sales Questions
NXPowerLite can only optimize standard/legacy .zip archives that contain Word, Excel, PowerPoint, JPEG or PDF files. If your .zip archive is non-standard, does not contain any of these file types, or is encrypted/password-protected, NXPowerLite will not be able to optimize it.