Did I download a virus?

I tried downloading some cracked software from getitonpc and after i opened the zip file that required a code and executed the exe file some windows briefly flashed but nothing happened. I deleted the files and now I see this icon pop up on the bar multiple times and when i press on it it dissapears. My steam account also got hacked after all this and someone sold all my items. Could someone try to hack my pc and what should I do? I have a full scan antivirus scanning at the moment. Please help