Hi @dudi and thanks for your query.
The updates for software and firmware are not forcibly applied but there is no option to prevent the software checking for new versions. Indeed, we would strongly recommend allowing at least firmware updates for your device as they can contain important performance enhancements.
When the Tobii Service is loaded, this in turn loads the other executables you mentioned (Except Tobii.EyeX.Interaction.Settings.UI.exe) which are a requirement for correct operation of the tracker and are in fact part of the Tobii Service itself so not something that can be disabled separately.
Apologies for the disappointing news, but hopefully you should not notice much impact on system performance as a result. Please let us know if we can provide any further assistance.