Check Windows Add/Remove programs and see if MSXML 6 SP2 is installed.
Installation of MSXML 6 Service Pack 2 (KB954459) failed because a higher version already exists on
the machine. To proceed, uninstall the higher version and then run MSXML 6 Service Pack 2
(KB954459) Setup again.
- XP SP3
- SQL Express 2005
When SQL Server Setup tries to install MSXML 6.0 SP2, it detects that the version of MSXML 6.0 that is described in Knowledge Base article 954459 is already installed on the computer. Therefore, the validation process indicates that the current version of MSXML 6.0 should not be replaced. This stops the installation of both MSXML 6.0 and SQL Server 2005.
See Microsoft's Support KB article for more information.
MS offers a work around to this issue in their KB article as follows:
- Download MSMXL fix from the following Microsoft website:
- Extract the fix, and then copy the MSXML6.MSP file and the MSXML_FIX.VBS file to the same folder.
- Run cscript MSXML_FIX.VBS.
- Once the fix is run, try installing SQL Express again.
For alternative solutions see Failed to create or configure database on SQL Server! ( SQL Server does not exist or access deni... and Error when installing SQL 2005 Express on a machine that had previously had MSDE installed