The latest version of the Bitrix24 Desktop app for Windows XP was released in 2016.
From October 3rd, 2018 Bitrix24 Desktop app for Windows XP stopped working. That means XP users are not able to use Bitrix24 Desktop app anymore.
Also, we do not guarantee the work of Bitrix24 in outdated versions of browsers and operating systems.
You can always download Bitrix24 Desktop app for other operating systems from our official website.