Alright, show your mom this post (if you can:)
Google Chrome, Steam, and games related to Steam are
not viruses. Millions of people around the world use Google Chrome and hundreds of thousands of people use Steam (and play Steam games) every day. None of them get a virus because of any of these programs. Google Chrome, Steam, and Steam games have all been validated by every major antivirus provider (such as McAfee, which I use myself.) In fact, I use Steam and play Steam games almost every day and
have never gotten a single virus from Steam or any Steam games.
If you want antivirus software, I recommend
AVG. It's free, and is used by many people, who don't have problems with it. This antivirus software will show you that Google Chrome, Steam, and Steam games are totally safe and, therefore, are not viruses.
Thank you for taking the time to read this and I hope that you will allow your kid to use Google Chrome, Steam, and Steam games.