Hello Siveria,
The answer to your question is a
qualified YES;
Prio is a
freeware application that does it perfectly in the background, with minimal user intervention.
All you have to do is install it, reboot your computer, run your targetted program once, go to your Task Manager while the program is running, right click on your application, and change the priority.
Prio will remember what you've chosen for that application, so that the next time it will launch at the same priority until you change it again manually for that specific program.
An added bonus to Prio is that It allows you change all sorts of other things like not only
CPU Priority, but also an remember's an application's
CPU preference (choosing the cores that you want an application to use) and also the default
Disk IO priority which is arguably more important when dealing with
disk intensive operations that could clog up your system like
File Extraction or
Bulk File Copies.
Here're a screenshot of the task manager after it's been modified by Prio:-
Prio - Priority Saver
Hope that answers your query.