Problem installing SQL Server 2005 express - supersocketnetlib error

I installed Windows XP professional on a computer which previously had Windows XP Home after a crash.  I wasn't able to uninstall everything before this and am now unable to install SQL Server 2005.  This is from the error log

Machine         : LAPTOP
Product         : SQL Server Database Services
Error           : The SQL Server service failed to start. For more information, see the SQL Server Books Online topics, "How to: View SQL Server 2005 Setup Log Files" and "Starting SQL Server Manually."
--------------------------------------------------------------------------------
Machine         : LAPTOP
Product         : Microsoft SQL Server 2005 Express Edition
Product Version : 9.2.3042.00
Install         : Failed
Log File        : c:\Program Files\Microsoft SQL Server\90\Setup Bootstrap\LOG\Files\SQLSetup0010_LAPTOP_SQL.log
Last Action     : InstallFinalize
Error String    : SQL Server Setup failed to modify security permissions on registry key SOFTWARE\Microsoft\Microsoft SQL Server\MSSQL.1\MSSQLServer\SuperSocketNetLib for user Anne. To proceed, verify that the account and domain running SQL Server Setup exist, that the account running SQL Server Setup has administrator privileges, and that the registry key  exists on the destination drive.
Error Number    : 29508
------