I'm having a similar problem as Ivano Luberti with files not being unzipped on SOME Windows 2000 PCs. On my Win 2000 Pro office PC the app works fine and unzips everything it should but on a client's PC it doesn't. My client is logging in as an Administrator so I don't believe it's a security issue. I'm using the latest version (1.6L Beta). I have similar problems with earlier versions. The code in question is trying to unzip a single file that has a directory attached to it. I set the FSpecArgs to 'data\general.db' and the extraction base dir is the windows temp folder (obtained via the GetTempPath) funtion. The ExtrDirNames option is set to false. The only other differences between my desktop pc and the client is that he's on SP2 while I'm on SP1, and he's using a laptop while I have a normal desktop PC. Can anyone help? Thanks Dominic