cisvc.exe keylogger

Hi there, 

 

How do I know that the cisvc.exe that is just recently causing my CPU to use 100% of it's memory is or isn't a hack/virus? 

I tried to find the indexing service from a post I found about this before. But I sadly couldn't find it. I went through control pannel and found something similar and disabled it, but it still runs and uses 100% of my CPU. I also find that it causes my computer to make the 'Ding' alert noises rappedly. 

 

Wondering if there is a way to tell if my cisvc.exe is infected. 

 

Thank you.