Winzix is a scam that pretends to be a new compression tool for Windows platform. Basically, after the installation, Winzix will place a header and footer on the file and that's all - no compression at all. Winzix is free to download and install, therefore the creator of the software makes money through advertising and possibly other nefarious means. Moreover, Winzix has a dangerous Trojan bundled with it, therefore it is a serious threat to the security of your machine. Once executed, Winzix will display pop-up adverts and may download additional malicious software.
[FONT=Verdana, Arial, Helvetica, sans-serif]It opens ZIX archives, presents a list of the contents, and lets you selectively extract whatever is inside(1). As a bonus, it warns you about some commonly known virus-infected things occasionally found inside. That's really all it does. That's all it needs to do.