Well, we're getting there slowly anyway!
As Tuvok has stated though, Google isn't a browser. It's a search engine, which can be used in
any browser. (Confusingly though, Google is also the company that produces the browser called Chrome).
So, before we can tell you how to update your browser, we need to know what it actually is!
Assuming that you're not using one of the lesser-known web browsers, it's likely to be Chrome, Firefox or Edge (or possibly Internet Explorer, as you're using Windows 8.1) that you've got. If you're not sure, look at your taskbar (at the bottom of your screen) to see which icon is showing for it.
The icon for Chrome looks like this
https://upload.wikimedia.org/wikipedia/commons/thumb/e/e1/Google_Chrome_icon_%28February_2022%29.svg/2048px-Google_Chrome_icon_%28February_2022%29.svg.png
If your browser is Firefox, you'll see this:
https://design.firefox.com/product-identity/firefox/firefox/firefox-logo.png
If you're using Edge, you'll see the logo on the left here for the old version or the one on the right for the new version:
https://i.insider.com/5dc040952f364a4cc223a064?width=1136&format=jpeg
Once we know which browser you're actually using, we might be able to tell you how to update it. However you need to note that both Edge and Chrome won't update to the very latest version on a Windows 8 machine. (Only Firefox can). So it might not be possible to bring your web browser fully up to date.