Yes, Adobe Flash Player 11.0 is compatible with Windows XP Professional on 64-bit. It was the first version developed for 64-bit platforms. Nowadays, the utility reaches version 14.0. It can be downloaded and installed from the official web page. Your operating system will be detected automatically, and you will need only to press the Install Now button. If you want the Flash Player for another computer or browser, click Need Flash Player for a different computer?, select the operating system and click Download Now.