Archived from groups: microsoft.public.windowsxp.security_admin (More info?
Sounds like you just have a corrupt ZIP file. Are you using built-in
XP zip functionality or a 3rd party ZIP tool? Some ZIP files are in
zip-64 format and thus are not always readable by older ZIP tools. You
might want to try a more robust freeware ZIP tool like JustZIPit or
ZIPGenius. Here's a comparoison of freeware ZIP tools that might help: