Windows Vista Updates fail

You try to install updates in Windows Vista. However, the installation may fail, and you may receive the following error message:
"WBEM_E_CRITICAL_ERROR (0x8004100A)"

This issue occurs for one of the following reasons:

1. The PATH environment variable does not contain the following information:
%windir%\system32\wbem
2. The Windows Management Instrumentation (WMI) registry subkeys have been modified. For example, if the registry subkey CLSID_WbemDefPath is missing, you receive the error message that is mentioned in the "Symptoms" section.

There are tow Method are use to resolve this issue,

Method 1

Add %windir%\system32\wbem to the PATH environment variable. To do this, follow these steps:

1. Click Start, right-click Computer, and then click Properties.
2. In the Computer name, domain, and workgroup settings area, click Change settings.

If you are prompted for an administrator password or for confirmation, type your password, or click Continue.
3. Click the Advanced tab, and then click Environment Variables.
4. In the System variables section, click to select Path, and then click Edit.
5. Add the following at the end of the Variable value text box:
;%windir%\system32\wbem
6. Click OK three times.

Method 2

Run the WMI Diagnosis Utility. To do this, follow these steps:

1. Download the WMI Diagnosis Utility version 2.0 (WMIDiag.exe). To do this, visit the following Microsoft Web site:
http://www.microsoft.com/downloads/details.aspx?familyid=d7ba3cd6-18d1-4d05-b11e-4c64192ae97d&displaylang=en (http://www.microsoft.com/downloads/details.aspx?familyid=d7ba3cd6-18d1-4d05-b11e-4c64192ae97d&displaylang=en)
2. Double-click the WMIDiag.exe file to extract the files that include the WMIDiag.vbs file.
3. Click Start, and then type cmd in the Start Search box.
4. Right-click cmd in the Programs list, and then click Run as administrator.

If you are prompted for an administrator password or for confirmation, type your password, or click Continue.

5. At the command prompt, type the following commands one at a time and press ENTER after each command.

Drive:
CD Path
WMIDiag.vbs

6. If the WMI Diagnosis Utility reports that WMI is not functioning correctly, follow the steps in the WMI Diagnosis Utility report to resolve the problem.