If you want to use a more secure web browser than Internet Explorer 8 (IE 8) (the built-in browser) on a Windows XP computer, then Google Chrome can be the best. But, you can not run the latest version of Chrome on old Windows systems like Windows XP and Vista. The last supported version of Google Chrome by Windows XP is Google Chrome 49.0. Although it is also an outdated browser, still, it is a more updated and secure browser compared to Internet Explorer 8. It's much faster than IE 8 and has many useful features that should be in a modern internet browser.
The download link for Google Chrome 49.0 for Windows XP and Vista 32-bit operating systems is listed above and Just click on the free download button and your download will automatically.