This short article shows you how to access OneDrive from Windows Explorer in Windows 8.1.
When you want to download the OneDrive app from the Internet, https://chanmingman.wordpress.com/2015/05/27/use-onedrive-with-windows-explorer/, you will the site written OneDrive comes preinstalled on Windows 8.1. OneDrive is not supported on Windows XP.
Somehow you cannot see the OneDrive in your Windows Explorer.
In order to see OneDrive in Windows Explorer, you need to Connect to a Microsoft Account by Change PC Settings.