Wincc 2008

Dear All,
I have a Question and humbley request help.

1. I cant install wincc 2008 into new pc workstation.It show error as
attach screen shot.it seem stop while install SQL

2. Work station pc using window XP (sp3) 32bit. Pc brand Hp.
I'm able to install step 7 but unable to install wincc

Try deinstall WinCC Flexible 2008.
Check if MS SQL server is still installed, and deinstall if it is.
Then try install WinCC Flexible again.

i had try uninstall wincc 2008 and retry but get same massage .
i even try uninstall SQL and try again..
do miss something

You can try to google "cant install Microsoft SQL Server", or "complete deinstallation Microsoft SQL server".
It may not be WinCC Flexible that is the problem.
Do you have other programs that use MS SQL server ?