Reseting a software based on windows RAM consumption

Hello!

Currently I'm developing a software that should be able to be reseted when Windows RAM memory is to high. Regarding this project, I would like to ask:

* Is it possible to command the reseting (not only closing! The software needs to be restarted) from within the software? Or I truly need to create a second software that is called when the reseting is needed and that controls the event?
**In case of needing to create a second software, how can I read Windows's process to check if/when my software is started so the second one, that to the restart, can be automatically closed?
* How can I know how much RAM memory is being used by Windows using Qt/C++?

I guess that's all that is needed.

Thanks,

Momergil