According to PHP.net, the latest release in the PHP 5.2.x series is now available for Windows users - PHP 5.2.9-2.

The PHP Development Team would like to announce the availability of a new Windows build for PHP - PHP 5.2.9-2. This release focuses on fixing security flaws in the included OpenSSL library (CVE-2009-0590, CVE-2009-0591 and CVE-2009-0789). The security advisory is available here. The OpenSSL library has been updated to 0.9.8k, which includes fixes for these flaws.

You can download this latest edition from the Downloads page on the main PHP.net site or from your favorite local mirror.