Aaron Margosis is a Windows nerd, focusing a lot on security, running with least privilege, and the application compatibility impacts of doing so. He is co-author with Mark Russinovich of the "Sysinternals Administrators Reference" (MS Press, 2011). He has published a number of useful tools over the years, including MakeMeAdmin, LUA Buglight, IE Zone Analyzer, and the Local Group Policy utilities on the Microsoft FDCC/USGCB blog. Aaron joined Microsoft Services in 1999, where he works with US government and other security-conscious customers.