The most important program that runs on a computer. Manages all the other programs in a computer. Manages all the hardware resources.
Windows: Most widely used. Mac OS: Only run on Macintosh computers. Linux: Open-source
Released June 25, 1998 New Features: Windows 98SE – Improved driver Released May 1999 support Recommended Improved PnP Hardware support Requirements: Internet Explorer 5 Processor: 486DX Customizable 66MHz or faster Taskbar (Pentium) Active Desktop RAM: 24MB Hard Drive: 500MB
Released February 17, New Features: 2000 Support for many Four versions: devices Professional, Server, Widows File Protection Advanced Server, & Encrypting File System Datacenter Server Accessibility Recommended System File Checker Hardware Recovery Console Requirements: Processor: 133MHz or higher (Pentium) RAM: 64MB Hard Drive: 2GB
Released September New Features 14, 2000 System Restore Recommended System File Hardware Protection Requirements: Windows Image Processor: 300MHz Acquisition (150MHz) Windows Movie RAM: 64MB (32MB) Maker Hard Drive: 2GB Windows Media (320MB) Player 7
Released October 25, New Features: 2001 Faster start-up Two major versions: Remote Desktop Home and Professional User Interface Recommended Windows Firewall Hardware Windows CD Requirements: burning Processor: 300MHz Security Center RAM: 128MB Wireless Connection Hard Drive: 1.5GB
Released January 30, New Features: 2007 Windows Aero 5 Versions: Home Basic, Windows Flip Home Premium, Windows Flip 3D Business, Enterprise, & Internet Explorer 7 Ultimate Microsoft Defender Recommended Windows Search Hardware Windows Sidebar Requirements: Improved security and Processor: 1GHz safety features RAM: 1GB Hard Drive: 40GB DVD-ROM
Released October 22, Features 2009 6 Editions: Snap Starter Peek Home Basic Shake Home Premium* Live Taskbar Previews Professional* Enterprise HomeGroup Ultimate* Windows Search System Requirements: Jump Lists 1GHz processor, 1GB Libraries RAM for 32-bit 2GB for Desktop slide show 64-bit, 20 GB disk space