Status of package 'SQL Server 2005 Express Edition' after install is 'InstallFailed'

I tired installing SQL server 2005 express in one pc n I got an error. Here is the log file

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Installing using command line '"C:\DOCUME~1\Ken\LOCALS~1\Temp\VSD3A.tmp\SqlExpress\sqlexpr32.exe" -q /norebootchk /qn reboot=ReallySuppress addlocal=all instancename=someinstance SQLAUTOSTART=1 SECURITYMODE=SQL SAPWD=abc'

Process exited with code 28111

Status of package 'SQL Server 2005 Express Edition' after install is 'InstallFailed'
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The client PC got Windows XP service pack 2, .Net 2.0. ALso, he's an admin. I even disabled his firewall n switch off his antivirus... still no luck.

Any Ideas? Thanks in advance

try re-downloading Sql Server Express SP1 from here
http://msdn.microsoft.com/vstudio/express/sql/download/
You only need the first file (SP1), see if that works.

hth,
mcm