I have some problem in installing sql server 2005 in my laptop. Windows 7 ultimate 32 bit os is installed in my pc. I want to install sql server 2005, so i 1st downloaded sql server 2005 express edition sp3 and sql server 2005 management studio sp3 and installed. But when i try to connect with server some error messages are coming like, "system.data has thrown some expection and system.config has thrown some expection". so i downloaded sql server 2005 sp3 for 32 bit processor. And if i try to install that its showing "SQLServer2005SP3-KB955706-x86-ENU is not a valid win32 application". Please help me out to overcome this problem.