Make a service that keeps program running.

I'm trying to build a service to do litecoin mining on an office I own. To sum it up it's a program that runs constantly and uses 99% of the cpu, running on all cores

I've made a service that runs a program using the following code:

ProcessStartInfo process = new ProcessStartInfo {
	CreateNoWindow = true,
	UseShellExecute = false,
	FileName = "C:\\miner\\minerd.exe",
	Arguments = "-u X.Y-p x --url=stratum+tcp://lowdiff.ltcrabbit.com:80",
	WindowStyle = ProcessWindowStyle.Hidden,
	RedirectStandardOutput = true,
	RedirectStandardError = true,
	ErrorDialog = false
};
proc.StartInfo = process

proc.Start();

Basically I need the program minerd.exe to run with those args, and that much works.

The problem is I want this program to run 24/7, even when the computer is logged off. And I'm not sure why, but the process just fizzles out after a while I'm guessing it has to do with some kind of throttling. How do I keep everything running At 100%?