What to Do if you have screwed up your SQL Server 2005 Setup

For Stand alone machine :
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Suppose you failed SQL Server 2005 setup , tried again ..failed ..did some changes , deleted few folders etc ....etc ......and finally messed up .......now what :)........

before blowing up the machine try this ..
open a notepad and copy this content :

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSSQLServer\Client]

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSSQLServer\Client\ConnectTo]

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSSQLServer\Client\DB-Lib]
"AutoAnsiToOem"="ON"
"UseIntlSettings"="ON"

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSSQLServer\Client\SNI9.0]

"ProtocolsSupported"=hex(7):73,00,6d,00,00,00,74,00,63,00,70,00,00,00,6e,00,70,
00,00,00,76,00,69,00,61,00,00,00,00,00

"ProtocolOrder"=hex(7):73,00,6d,00,00,00,74,00,63,00,70,00,00,00,6e,00,70,00,
00,00,00,00


[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSSQLServer\Client\SNI9.0\GeneralFlags]
"NumberOfFlags"=dword:00000002


[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSSQLServer\Client\SNI9.0\GeneralFlags\Flag1]


"Label"="Force protocol encryption"
"Value"=dword:00000000


[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSSQLServer\Client\SNI9.0\GeneralFlags\Flag2]


"Label"="Trust Server Certificate"
"Value"=dword:00000000


[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSSQLServer\Client\SNI9.0\LastConnect]

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSSQLServer\Client\SNI9.0\np]
"DLLname"="SQLNCLI"
"NumberOfFlags"=dword:00000000
"NumberOfProperties"=dword:00000001
"ProtocolName"="Named Pipes"


[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSSQLServer\Client\SNI9.0\np\Property1]
"Name"="Default Pipe"
"Value"="sql\\query"

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSSQLServer\Client\SNI9.0\sm]
"DLLname"="SQLNCLI"
"NumberOfFlags"=dword:00000000
"NumberOfProperties"=dword:00000000
"ProtocolName"="Shared Memory"

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSSQLServer\Client\SNI9.0\tcp]
"DLLname"="SQLNCLI"
"NumberOfFlags"=dword:00000000
"NumberOfProperties"=dword:00000003
"ProtocolName"="TCP/IP"


[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSSQLServer\Client\SNI9.0\tcp\Property1]
"Name"="Default Port"
"Value"=dword:00000599


[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSSQLServer\Client\SNI9.0\tcp\Property2]
"Name"="KEEPALIVE (in milliseconds)"
"Value"=dword:00007530


[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSSQLServer\Client\SNI9.0\tcp\Property3]
"Name"="KEEPALIVEINTERVAL (in milliseconds)"
"Value"=dword:000003e8

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSSQLServer\Client\SNI9.0\VIA]
"DLLname"="SQLNCLI"
"NumberOfFlags"=dword:00000000
"NumberOfProperties"=dword:00000002
"ProtocolName"="VIA"


[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSSQLServer\Client\SNI9.0\VIA\Property1]
"Name"="Default Server Port"
"Value"="0:1433"


[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSSQLServer\Client\SNI9.0\VIA\Property2]
"Name"="Default Client NIC"
"Value"="0"

Now save this file as .reg >> double click this file and import it ......
start the setup .......and cross your fingures .....
I tried this on STD edition ........
Actually this is the complete healthy registry key set needed for a successful setup ...
I have seen 50% problems get solved ..
All the best to you ......
Try at your own risk and take a complete registry backup .....