Someone using openvpn to hack into my computer?

[TheHonorableReese]

I noticed my computer was running very slow, so I opened up the task manager and discovered a program called "openvpn" that was taking up almost 100% of CPU power. I closed the process and then looked it up online, during which I found that it is a "virtual network" setup that people use to make secure connections between computers. I know for sure I never personally installed this. I did a search on my computer, but couldn't find the program installed anywhere. I also tried to block the program through the windows firewall and by preventing startup in msconfig, but it was not listed their either, as if it doesn't exist or is somehow hidden from me finding it.

Could someone have used or be using this program to hack into my computer? If so, how can I prevent this from happening? I'm running virus/malware scans right now, though obviously it will take a while to get results.