Windows Update Already Installed

Windows Update Already Installed - The Resolution!

To resolve this issue, complete the following methods in the order that they are listed here.

Method 1: Reinstall the Update

Download the update again:

1. Click Start, point to All Programs, and then click Windows Update.

2. On the Windows Update home page, click Scan for updates.

3. Select the updates that you want to download (including updates that you have already installed on your computer), and then click Install now.

4. Click Yes when you are prompted to install any required software or device drivers.

5. Restart your computer if you are prompted.

To determine if you have resolved the issue, repeat steps 1 and 2 to confirm that the updates that you installed are listed in Windows Update. If the list of updates still includes items that you have already installed on your computer, complete with Method 2 to resolve this issue.

Method 2: Delete the Registry Key, and Then Reinstall the Update

WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.

To resolve this issue, delete the registry key that is associated with the update that you installed, and then reinstall the update:

1. Click Start, point to All Programs, and then click Windows Update.

2. On the Windows Update home page, click Scan for updates.

3. Note the number of the Microsoft Knowledge Base article (a six-digit number) that is referenced in the update that you are trying to install.

4. Close the Windows Update home page.

5. Start Registry Editor (Regedit.exe).

6. Locate and double-click the following key in the registry:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Windows XP\SPx

Note For x, use the number for the next service pack. For example, if you are running Windows XP SP1, locate the SP2 key.

7. Under the SPx key, locate and click the registry entry that corresponds to the number of the Microsoft Knowledge Base article (the six-digit number that you noted earlier).

For example, if the Microsoft Knowledge Base article number that you noted was "810217," locate and click the following key in the registry:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\Windows XP\SP1\KB810217

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