Error when install or uninstall an Ektron applcation

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Unable to install and/or uninstall an Ektron applcation because the Windows Installer files that are on your hard disk are damaged or are missing.

When you try to install and/or uninstall an Ektron application on Windows XP or Windows Server 2003, you may receive the following error message:

The Windows Installer Service could not be accessed. This can occur if you are running Windows in safe mode, or if the Windows Installer is not correctly installed. Contact your support personnel for assistance.

 This problem may occur if one of the following conditions is true:

                   

•The Windows Installer files that are on your hard disk are damaged or are missing.
•You install or remove a program that uses the Windows Installer Microsoft Software Installation (MSI) package file (.msi). For example, this may occur when you try to install Microsoft Office on your computer.

Microsoft suggests reinstall the Windows Installer. To reinstall the Windows Installer, rename the damaged Windows Installer files, and then reinstall the Windows Installer. To do this, follow these steps:

                                                                                                                   

1.Click Start, click Run, type cmd in the Open text box, and then click OK.
2.Type cd %windir%\system32, and then press ENTER.
3.Type attrib -r -s -h dllcache, and then press ENTER.
4.Type ren msi.dll msi.old, and then press ENTER.
5.Type ren msiexec.exe msiexec.old, and then press ENTER.
6.Type ren msihnd.dll msihnd.old, and then press ENTER.
7.Type exit, and then press ENTER.
8.At the command prompt, type exit, and then press ENTER.
9.Click Start, and then click Turn off computer or Shut Down.
10.Select the Restart option, and then click OK, or click Restart.
11.Log on to the computer.
12.Download and install the latest version of the Windows Installer. For more information about how to obtain the Windows Installer, click the following article number to view the article in the Microsoft Knowledge Base:
  893803 (http://support.microsoft.com/kb/893803/) Windows Installer 3.1 v2 (3.1.4000.2435) is available
 
13.Click Start, and then click Turn off computer or Shut Down.
14.Select the Restart option, and then click OK, or click Restart.
http://support.microsoft.com/kb/315346