During the Windows XP era, average Windows users typically used their PC with an Administrator account all the time. Many applications developed for Windows XP will work properly on a modern version of Windows, except for one little issue. RELATED: Why You Shouldn't Disable User Account Control (UAC) in Windows RELATED: Is Windows 10 Backwards Compatible With Your Existing Software? Run as Administrator These tricks cover a variety of applications, from Windows XP-era apps and old PC games that require outdated DRM to DOS and Windows 3.1 applications.