My donloadable exe is asking for unzip

[isnoend07]

I have an online exe for download. This file is an installation program, a potential customer is telling me his pc is asking for an unzip program. How could this be?
The extension is .exe and runs fine when testing. Why would his pc be asking for an unzipping program?

[RobDog888]

What did you use to package your exe?

Thread Moved

[isnoend07]

What did you use to package your exe?

Thread Moved

Using Izarc to create self-extracting archives. been using this for about 3 years
without problems.
http://www.izarc.org/

[RobDog888]

From its FAQ page...

Q: I get CRC errors when I try to extract a file. What does it mean?
A: Basically this means that the file could not be extracted correctly because the data within the archive has been corrupted (the file that you are extracting does not match with the file that was compressed). This usually happens during the transfer over the internet if the connection is unstable. Also it can happen when open archive from scratched CD/DVD disks. You can try to repair the archive (Ctrl+ R) or download it again (if you downloaded it from internet).