it sounds like a virus on your puter



if you've done a virus check from www.antivirus.com
try to download a zip from the internet
anything, but over 5 mg
if it unzipped fine then try the fix below
if it did not unzip then dont do this

goto
startmenu/control panel-
system/hardware-
device manager/ide controllers-
click on the primary or secondary ide channel that your cd is on
goto advanced settings
and set your cd player to p10 mode only from the dropdown box

reboot and try to unzip

on your next post please give full details on your system specs

thanks

egghead