SQL Server 2008 R2 installation after SQL Server 2008

I had SQL Server 2008 R2. But then I need to have SP1. I downloaded SQLServer2008R2SP1-KB2528583-x64-ENU from Microsoft website and run it. After installation everything was ok, but SQL Server Management Studio didn't work. I downloaded SQL Server Management Studio SP1, but no luck.

After some googling I decided to re-install SQL Server. I totally removed SQL Server and try to run R2 SP1 installer again. But got following issue:

1. SQL Server installation center opens
2. I click "New installation"
3. SQL Server 2008 R2 Setup screen opens and offer to install support files
4. Click Next
5. Progress goes to 100%, seems everything ok, but window disappears and nothing happens....

Logs:

• 04/29/2012 16:09:15.372 Attempting to run user requested action from local setup100.exe
• 04/29/2012 16:09:15.430 Attempting to launch process C:\Program Files\Microsoft SQL Server\100\Setup Bootstrap\SQLServer2008R2\x64\setup100.exe
• 04/29/2012 16:09:15.463 Error: Failed to launch process
• 04/29/2012 16:09:15.513 Error: Failed to launch local setup100.exe: 0x80070003

Does anybody know what's problem?

Thanks

Solved!

Goto "Programs and Components" and remove "Microsoft SQL Server 2008 R2 Setup". Then, run installer again

Solved!

Goto "Programs and Components" and remove "Microsoft SQL Server 2008 R2 Setup". Then, run installer again