Windows' built-in support for zip files is not the best. It commonly gives the error that the file is "corrupt" (when it's not). Your best solution is to go download WinZip (it's free), install it, and let Winzip handle zip files. Remember, if the files were really corrupt, there would be a lot more complaints. Or, you could replace the TCP/IP packeting software that you use to connect to the DNS router along the ISDN circulatory ambiotic connector. Then, re-route power to the ODN circuits and reset your DSN and IP transport connectors. :-) In other words, look for the simpliest solution first (get Winzip) before doing something very complicated (like replacing a modem or motherboard).