Unfortunately, we do not support Windows XP at version 15. You can try to install v15 to see if it works, but please note that we can't assist you if there is an issue with v15 on Windows XP. For more information, please read this article.
Yes and no. If you have a subscription license, you can connect from v15 to v14. If you are a private user, we are asking to update to the latest version of TeamViewer in order to continue using the software. For more information, please read this article.
We haven't planed sunsetting v14 at this moment. Payingcustomers are encouraged to updateto the latest version butcan remain using their purchased versionalong the lines of theproduct lifecycle policy