By default, Windows XP treats ZIP files like folders. If you're not familiar with ZIP files, this can be convenient. However, if you've already got a utility in place to manage your ZIP files (such as WinZip), this new feature can just get in the way. To turn this feature off, click on the Start button and select Run. Type in 'regsvr32 /u %windir%\system32\zipfldr.dll' and press OK. Restart your computer for the changes to take effect. To re-enable the feature at any time, go to the Run command and type in 'regsvr32 %windir%\system32\zipfldr.dll' then press OK.