So I was talking to Steam Support about my account then my computer started to retype the things I said. I thought it had to do with my macros because it has been acting up recently, so I opened a new tab to let the typing finish. But now it was typing different things. It ended with "asdfqwerhsdvlHAHAHAHAHAH." It hasn't done anything else after that. I did virus scans, but it didn't catch anything. What should I do?