| Effective Date | Supported Operating Systems |
| Current |
Level 1 - Best effort Windows 7 (Enterprise and Professional), Windows XP Professional, Mac OS X 10.7, Mac OS X 10.6 Level 2 - Limited support Windows XP Tablet PC Edition, Windows XP Home Edition (ResNet only), Windows 7 (Home Premium, Ultimate (ResNet only)), Mac OS X 10.5 Level 3 - Unsupported Windows 2000, Windows XP x64 Edition, Windows XP Media Center Edition, Windows Vista (All versions), Mac OS X 10.4, Linux and anything not in Level 1, Level 2, or prohibited by Level 4 Level 4 - Not allowed DOS, Windows 95/98/ME and older, Windows NT 4 and older, Windows 7 Starter, Windows 7 Home Basic, Windows Vista Starter, Windows Vista Home Basic, Mac OS 9.x and older, Mac OS X 10.3 and older, any homegrown, beta or pre-release OS, any OS designed primarily to provide server services (ex. Windows 2008 Server, Red Hat Enterprise Linux Server) |