Run as System is described as 'is the useful tool for testing computer startup scripts, or if you need to figure out the behavior of a program when run as SYSTEM'. There are three alternatives to Run as System for Windows. The best alternative is Sysinternals Suite, which is free. Other great apps like Run as System are PsExec (Free, Open Source) and OpenArk (Free, Open Source).
The Sysinternals Troubleshooting Utilities have been rolled up into a single Suite of tools. This file contains the individual troubleshooting tools and help files. It does not contain non-troubleshooting tools like the BSOD Screen Saver or NotMyFault.
PsExec is a light-weight telnet-replacement that lets you execute processes on other systems, complete with full interactivity for console applications, without having to manually install client software.