If you are happy with your Windows XP, but you like the aesthetics, appearance and appearance of Windows Vista, then a first step would be this program called QT Address Bar which changes the appearance of the XP address bar to the more stylized, Subtle and elegant Vista. Thus, at least, your XP will have a more modern aesthetic look without losing its functionality and efficiency at all.
For proper operation you need to have previously installed NET Framework 2.0 or higher.
You can free download QT Address Bar 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.