SQL Server Express 2008 Installation failure due to NET framework

Question

I am trying to install microsoft sql server express 2008 on windows xp which has both net framework 2.0 and 3.5 installed and in the log i find this error. I have no idea how does this happen. I verified HKLM\\SOFTWARE\\Microsoft\\Net Framework Setup\\NDP\\2.0.50727\\Install value is 0x1

01/13/2014 15:45:06.578 ======================================================================
01/13/2014 15:45:06.578 Setup launched
01/13/2014 15:45:06.578 Attempting to determine media source
01/13/2014 15:45:06.578 Media source value not specified on command line argument.
01/13/2014 15:45:06.578 Setup is launched from media directly so default the value to the current folder.
01/13/2014 15:45:06.593 Media source: c:\59da7d719009b7aa270f\
01/13/2014 15:45:06.593 Attempt to determine media layout based on file 'c:\59da7d719009b7aa270f\mediainfo.xml'.
01/13/2014 15:45:07.078 Media layout is detected as: Core
01/13/2014 15:45:07.078 Media LCID is detected as: 1033
01/13/2014 15:45:07.078 Local setup.exe not found, so continuing to run setup.exe from media.
01/13/2014 15:45:07.078 /? or /HELP or /ACTION=HELP specified: false
01/13/2014 15:45:07.078 Help display: false
01/13/2014 15:45:07.078 Checking to see if we need to install .Net version 2.0
01/13/2014 15:45:07.093 Determining the cluster status of the local machine.
01/13/2014 15:45:07.109 The local machine is not configured as a cluster node.
01/13/2014 15:45:07.109 Attempting to find media for .Net version 2.0
01/13/2014 15:45:07.109 .Net version 2.0 needs to be installed from media: c:\59da7d719009b7aa270f\
01/13/2014 15:45:07.109 Error: Unable to find media for .Net version 2.0
01/13/2014 15:45:07.109 .Net version 2.0 installation failed, so setup will close. Error code: 0x84C40007
01/13/2014 15:45:07.109 Setup closed with exit code: 0x84C40007
01/13/2014 15:45:07.109 ======================================================================

Answer 1

您是否已安装完整版本的.Net，或者仅仅是精简的客户端配置文件？