Error: A previous program installation created pending file operations on the installation machine. You must restart the computer before running setup

Restart the computer and see if you are able to run the setup. If the restart does not help, use the steps that follow.
1. Perform these steps and then run the SQL Server 2000 setup again:
a. Click Start, and then click Run.
b. In the Open dialog box, type: “Regedit” (without the quotation marks) or “Regedt32” (without the quotation marks)
c. Click OK.

NOTE: Please make sure that you only delete the value mentioned, not the whole session manager key.
d. In Registry Editor, expand the following registry subkey:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager
e. On the File menu, click Export.

NOTE: In Microsoft Windows 2000, click Export Registry File from the Registry menu.
f. In the File name text box, type: “Session Manager Key” (without the quotation marks)
g. Click Save.
h. In the right-pane of the Registry Editor window, right-click PendingFileRenameOperations. On the shortcut menu that appears, click Delete.
i. In the Confirm Value Delete message dialog box that appears, click Yes.
j. On the File menu, click Exit.

NOTE: In Windows 2000, click Exit on the Registry menu.
k. Restart the computer.
l. Using the Registry Editor, verify that the PendingFileRenameOperations registry value is not available.

Note The PendingFileRenameOperations registry value may be re-created when you restart the computer. If the registry values are re-created, delete the PendingFileRenameOperations registry value again by completing steps a through j, and then run SQL Server 2000 Setup. Do not restart the computer before you run SQL Server 2000 Setup.
2. Check other control set keys (for example, ControlSet001, ControlSet002, and so forth) for the same values and also delete them.
3. Identify the virtual memory settings on the computer. If the paging file is too small or if there is no paging file, this error message may occur at startup:
Limited Virtual Memory Your system has no paging file or the paging file is too small.
If the error message occurs, determine the placement of the paging file from the virtual memory settings and give that drive full permissions for the system account.

Error: Unable to install MSDTC during setup up

MS DTC on computers with multiple network cards could affect this configuration hence, MS DTC cannot be installed on a server with multiple network cards, uninstall one of the network cards, and then retry the SQL Server Setup. This should work and setup will run successfully

Error: SQL Server Setup failed while installing services

Please make sure that if the setup failed and there is a SQL instance installed earlier then you must delete the below mentioned registry key for starting the installation again.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSSQLServer HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SQLServerAgent HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSSQLServer HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft SQL Server

Error: Rule “SQL Server Database Services feature state” failed

While Installing SQL 2008 cluster installation after installing on one node when trying to add a failover cluster node in the “add Node Rules” I get following message:
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Rule Check Result
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Rule “SQL Server Database Services feature state” failed.

The SQL Server Database Services feature failed when it was initially installed. The feature must be removed before the current scenario can proceed.
Resolution: Please follow the below mentioned steps to resolve this issue.

Change registry key on active node:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft SQL\  Server \ MSSQL10.BENEDICT\ConfigurationState
Change all 4 values from 2 to 1

Download and extract the service pack by running the following command:

SQLServer2008SP2-KB979450-x64-ENU.exe /x:C:\SP2

Run: C:\SP2\x64\setup\1033\sqlsupport.msi

Run from source media:
Setup.exe /PCUSource=C:\SP2 /SkipRules=Cluster_IsDomainController Cluster_VerifyForErrors /Action=AddNode

The solution works after making changes in registry key  HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft SQL Server\MSSQL10.BENEDICT\ConfigurationState
Change all 4 values from 2 to 1