File Extensions Help
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Unable to Extract .zip Files
The following error message may be displayed on your Windows Vista computer, when you try to use the WinZip utility to extract a compressed file with the .zip file name extension:
This file was compressed using an unknown compression method. Please visit www.winzip.com/wz54.htm for more information. The compression method used for this file is 98. error: no files were found - nothing to do
Cause of the Error
This problem occurs in the following conditions:
Now, the compression method used by WinZip 10 is incompatible with some Windows versions and some earlier WinZip versions. This is the reason why the error message given above is displayed when you try to open a WinZip 10 file with an earlier WinZip version on a Windows Vista computer.
To prevent and work around this problem, do the following:
When you create an archive using the Maximum (portable) compression technique, the file can be opened using earlier WinZip versions.
If you need more information about the error message, you may open the following WinZip Web site: