Win7Zip is 7-Zip GUI. 7-Zip is a high-compression file archiver. It can unpack a multi-part RAR volume embedded in a ZIP archive, and gives a meaningful error message when attempting to unpack a 256 bit encrypted WinZip archive.
DO NOT INSTALL THIS. It contains malware called "Search Conduit" - google that and see the headache involved in removing it. The project needs to be destroyed (deleted from SF.net servers), as well as the involved users' accounts. On a side note, the originators of the malware should be shot in the head or given massive amounts of LSD in a Saw-movie type situation, while they try to fight their own spam to survive. Anyway, this project has no place on SF.net. IT IS NOT 7ZIP!!! Granted it may contain a copy, but why did I install this anyway as I've long known that the real 7-zip already has a Windows GUI!!! Where's my head at? IF YOU HAPPENED TO HAVE INSTALLED THIS. There's a 30-day trial of VIPRE Internet Security available. Somehow though my dad was able to remove it by clearing all history cache, related files, etc. It's not immediately possible to remove the add-on in IE (won't let you). HTH