Detected random screenshots

[Chillypill]

Hello. Today while playing world of warcraft on a privateserver i noticed my computer tried to take a random screenshot. I noticed it because in world of warcraft when you take a screenshot it says "screen captured", but now it suddenly came up and said "screencapture failed". Its funny I think I actually noticed it before, so im in doubt if I have some malware on my PC that takes random screendumps and sends them back.

I tried varius malware removal tools but they havent found anything and now has SnD. Now im getting even more paranoid so I have thought about getting a sniffer program so trace all packages going out to see if any traffic I dont know off is going out.

Do you guys know of anything that can help me to clarify wether this is some kind of malware monitoring my PC? Like can i get a program that detects when my pc is trying to make screenshot?

Kind regards, Chillypill