Trojan

Hello,
When i was loading up my crossfire this morning it had to patch but when it started patching i got a pop up saying that i have recieved a trojan virus. I went to file(one of my options) and it was being shown as my crossfire.exe. I was unable to uninstal any programs so i manually deleted crossfire. I am currently reinstalling to see if it will happen again. After manually deleted i did a virus scan and the trojan was gone. I figured i would post here to see if there was any specific reason why this happened. Thank you.

~Alex