I need to start applications in any priority to avoid interferre their access. How is possible to select priority (real-time, high, low etc.) for application or process start?
No this way - I need set it automatically - in Task Manager it is this way known and possible. I need to set priority for some applications when I execute them without any changing later.
Improperly setting process priority will result in an unresponsive system. It isn't really meant to be messed with. Windows automatically adjusts priority when needed.