I don't have a windoze box right now but try this link
http://www.microsoft.com/windows/products/winfamily/ie/ie8/getitnow.mspxbtw take a look at these stupid system requirements
Expand/Collapse
Computer/Processor
Computer with a 233MHz processor or higher (Pentium processor recommended)
Expand/Collapse
Operating System
*
Windows Vista x64 and x86
*
Windows Vista Service Pack 1 (SP1) x64 and x86
*
Windows XP Service Pack 2 (SP2)
*
Windows XP Professional x64 Edition
*
Windows Server 2008 x64 and x86
*
Windows Server 2003 Service Pack 2 (SP2) x64 and x86
Expand/Collapse
Memory
*
Windows Vista - 512MB
*
Windows Vista Service Pack (SP1) - 512MB
*
Windows XP Service Pack 2 (SP2) - 64 MB
*
Windows XP Professional x64 Edition - 128 MB
*
Windows Server 2003 Service Pack 2 (SP2) - 64 MB
*
Windows Server 2003 Service Pack 2 ia64 - 128 MB
*
Windows Server 2008 – 512MB
Expand/Collapse
Drive
CD-ROM drive (if installation is done from a CD-ROM)
(Internet Explorer 8 Beta is only available via download)
Expand/Collapse
Display
Super VGA (800 x 600) or higher-resolution monitor with 256 colors
Expand/Collapse
Peripherals
Modem or Internet connection; Microsoft Mouse, Microsoft IntelliMouse, or compatible pointing device
I wonder those 233 MHz Pentium MMX with 64 MB of ram runs windows XP SP2

or why did microsoft mentioned CD-Rom Drive