Xolehlp.dll problen When I try install SQL server 2005 x86 ver. then xolehlp.dll problem is arise and display message like "This application is failed to start because XOLEHLP.DLL was not found. Re-installing the application may fixed this problem" Regard & Thanks MD Ali

Have a look at below article:
http://www.katieandemil.com/microsoft-sql-server-error-18456-login-failed-for-user#lesscommon

upgrade it or
take backup of your database
install sql server 2008
Restore backup in sql server 2008

If you have removed it from control panel, its done. You just have to clean up any left over registry entries using CCleaner and then try installing again
http://www.ccleaner.com/download
You may also want to check out this microsoft link if it doesn;t work
http://office.microsoft.com/en-us/help/HP011128601033.aspx

You must select what features you want to install with SQL Server 2005.

You must create an ODBC connection to your SQL database in the Windows Control Panel. Than you can call your ODBC connection via Visual Studio 2005. You can also create a DSN in Visual Studio 2005 and reference in that way. You will not be able to connect to an MDF but instead you have to connect to the SQL Server Service. Of course the username you use to connect must have access that will be created on the SQL server.

Hi,

You can download Windows Server 2003 (SP2) from following link:

http://www.microsoft.com/downloads/details.aspx?FamilyID=95ac1610-c232-4644-b828-c55eec605d55&displaylang=en

Thanks.

try to complete uninstall .net framework and install it again or get the latest copy of .net framework to install 3.5 latest version already available for download

are you installing from DVD ?

Maybe try copying installation to local drive.
Do not copy to desktop or other sub folder of "Documents and Setting" as this causes other problems in some cases.

TITLE: Connect to Server
------------------------------
Cannot connect to KRISHNA-02E4A78\SQLEXPRESS.
------------------------------
ADDITIONAL INFORMATION:
Login failed for user 'KRISHNA-02E4A78\Guest'. (Microsoft SQL Server, Error: 18456)
For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&EvtSrc=MSSQLServer&EvtID=18456&LinkId=20476
------------------------------
BUTTONS:
OK
------------------------------

I followed the advice given above and copied the ORACLE_HOME/bin/ociw32.dll to ora73.dll in the same directory. copy ociw32.dll ora73.dll
And the software worked immediately.