This article applies to all TeamViewer users.
As personal use we understand any use of TeamViewer for purposes that are neither directly nor indirectly paid.
It is not about whether the service itself is paid but whether the service is rendered within the context of the creation of an added value with some kind of financial compensation.
In the above mentioned cases for indirect payment TeamViewer is used for creating an added value, the payment takes place indirectly through salaries or a combination of sales/support activities.
In any case, the use of TeamViewer with family and friends without any financial compensation is considered as personal use.
If your TeamViewer falsely detects a commercial usage, please refer to this article to find more information and a link to the form to request the unblock of your TeamViewer ID.
If your machine runs a Windows Server operating system (e.g. Win 2008, Win 2012...), this will classify your usage as commercial automatically.
Please read this article for information: Why do I see TeamViewer trial - 'Your trial period has expired' ?