Pre-Requisite for SharePoint 2010

Below are the Order of Installation for SharePoint 2010

 1  Microsoft Windows Server 2008 Standard SP2
   http://go.microsoft.com/fwlink/?LinkId=166500

 2  Microsoft .NET Framework 3.5 Service Pack 1
  http://go.microsoft.com/fwlink/?LinkId=131037


3 Windows Server 2008 with SP 2 FIX:
A hotfix that provides a method to support the token
authentication without transport security or message encryption in WCF is
available for the .NET Framework 3.5 SP1
http://go.microsoft.com/fwlink/?LinkID=160770

4 Windows PowerShell 2.0 
http://go.microsoft.com/fwlink/?LinkId=161023

5. Microsoft SQL Server 2008 SP1

http://go.microsoft.com/fwlink/?LinkId=166490

6. Cumulative update package 2 for SQL Server 2008 Service Pack 1
http://go.microsoft.com/fwlink/?LinkId=165962

7. Microsoft SQL Server 2008 Native Client

http://go.microsoft.com/fwlink/?LinkId=166505

8. Microsoft SQL Server 2008 Analysis Services ADOMD.NET
http://go.microsoft.com/fwlink/?LinkId=130651

9. ADO.NET Data Services v1.5 CTP2 for Windows Server 2008 SP2

http://go.microsoft.com/fwlink/?LinkId=158354

10 Windows Identity Framework for Windows Server 2008
http://go.microsoft.com/fwlink/?LinkID=160381

11 Microsoft Sync Framework v1.0
http://go.microsoft.com/fwlink/?LinkID=141237&clcid=0x409

12 Microsoft Filter Pack 2.0

http://go.microsoft.com/fwlink/?LinkId=166504
 
13 Microsoft Chart Controls for Microsoft .NET Framework 3.5

http://go.microsoft.com/fwlink/?LinkID=141512

14 Microsoft Server Speech Platform

http://go.microsoft.com/fwlink/?LinkID=179612

15 Speech recognition language for English
http://go.microsoft.com/fwlink/?LinkID=179613

16 Microsoft Silverlight 3
http://go.microsoft.com/fwlink/?LinkId=166506

17 SQL Server 2008 R2 November CTP Reporting Services Add-in for Microsoft SharePoint Technologies 2010

http://go.microsoft.com/fwlink/?LinkID=164654&clcid=0x409




Ref:  http://technet.microsoft.com/en-us/library/cc262485(office.14).aspx