WinZip registration codes consist of 30 characters formatted as 6 groups of 5 characters separated by hyphens (WinZip 10 and later). WinZip 9.0 (and earlier) used an 8 digit registration number.
Registration codes from one major version of WinZip cannot be used to register another major version of WinZip. For example, if you have WinZip 20 registration information, you can install and register a perpetual version of WinZip 20.0 or WinZip 20.5, but your information will not work in WinZip 19 or WinZip 27. If you install the current version of WinZip over an older, existing, registered copy of WinZip; the result will be an evaluation version of WinZip. Please check both the WinZip version that you purchased and the WinZip version that is installed.
In order to obtain a registration code for the current version of WinZip, an upgrade must be purchased.
If you want to continue to use your existing licensed version of WinZip instead of upgrading, the installation file for that earlier version may be downloaded from the Alternative Download Links page. It will be necessary to uninstall the current version of WinZip prior to installing the older version. Once the older version has been installed, the registration code for that particular version may be entered. The current version of WinZip can be downloaded directly from the Download WinZip page. If you have lost your registration code, please see Registered Product Lookup on the WinZip Support website.
If you just purchased the current version of WinZip, please make sure that the installed version is correct (not an earlier evaluation) and make certain that you entered the correct registration information. You may also want to see How to register WinZip software with a registration code.