How to check which version of the Windows Update Agent is installed

1. Open the %systemroot%\system32 folder. %systemroot% is the folder in which Windows is installed. For example, the %systemroot% folder is C:\Windows.

2. Right-click Wuaueng.dll, and then click Properties.

3. Click the Details tab, and then locate the file version number.

Note: The latest version of the Windows Update Agent for Windows 8.1 is 7.9.9600.16422. The latest version of the Windows Update Agent for Windows 8 is 7.8.9200.16693. The latest version of the Windows Update Agent for Windows 7, Windows Vista, and Windows XP is 7.6.7600.256.

Error Code 8007066A or 66A

This problem may be caused by system corruption on your computer. For example, your computer may have corrupted hard disk sectors, or an application may have overwritten the .NET Framework files.

To resolve this issue, try one or more of the following methods in the order they are listed.

Method 1: Fix MSI software update registration corruption issues

http://go.microsoft.com/?linkid=9666880

Method 2: Repair the .NET Framework

Method 3: Manually download and install the update

Method 4: Uninstall and reinstall the .NET Framework

.NET Framework cleanup tool :

http://blogs.msdn.com/cfs-file.ashx/__key/CommunityServer-Components-PostAttachments/00-08-90-44-93/dotnetfx_5F00_cleanup_5F00_tool.zip

For more information : http://support.microsoft.com/kb/2507641/en-US

Error Code 8024200d

1. Exclude the Software Distribution Folder from AntiVirus scan selection list or install System Update          Readiness tool.

2. If the above mentioned solution does not work, stop the Windows Update service and rename the Software Distribution folder.

3. Start the Windows Update service. 

4. Download the patch from Microsoft and install manually.

Error Code 80070643

This error code occurs due to corrupted .NET framework.

In regards to repair the .NET framework we need to uninstall all the .NET components and re-install them.

In process of uninstalling the .NET components, if it stuck at .NET framework 3.5 then it need to be repaired by re-installing .NET 3.5 redistributable package.

If failed, use .NET cleanup tool to uninstall .NET components

After complete un-installation of .NET components, reboot the machine.

Install all the .NET framework from .NET framework 1.1 to .NET framework 3.5 SP1 as they have to be installed in the order.

After successful installation of all the .NET components, reboot the machine.

Install the patches through Windows Update.

Error Code 80248015

To resolve this problem, follow these steps:

1. Stop the Background Intelligent Transfer Service and the Automatic Updates service. To do this, follow these steps:
1. Click Start, click Run, type cmd, and then click OK.
2. At the command prompt, type the following commands, and then press ENTER after each command:
   net stop wuauserv
   net stop bits
   Exit

2. Rename the "SoftwareDistribution" folder:
1. Click Start, click Run, type %systemroot%, and then click OK.
2. Right-click the SoftwareDistribution folder, and then click Rename.
3. Type SoftwareDistribution_old, and then press ENTER to rename this folder.

3. Start the Background Intelligent Transfer Service, the Automatic Updates service, and the Event Log service. To do this, follow these steps:
1. Click Start, click Run, type cmd, and then click OK.
2. At the command prompt, type the following commands, and then press ENTER after each command:
   net start bits
   net start wuauserv
   exit

Error Code 80070570

To resolve this problem, follow these steps:

1. Stop the Background Intelligent Transfer Service and the Automatic Updates service. To do this, follow these steps:
1. Click Start, click Run, type cmd, and then click OK.
2. At the command prompt, type the following commands, and then press ENTER after each command:
   net stop wuauserv
   net stop bits
   Exit

2. Rename the Catroot2 folder.
   
   Note Do not follow this step if you are using Microsoft Windows 2000.
   
   To rename the Catroot2 folder, follow these steps:
1. Click Start, click Run, type cmd, and then click OK.
2. At the command prompt, type the following commands, and then press ENTER after each command:
   net stop cryptsvc
   ren %systemroot%\System32\Catroot2 catroot2_old
   net start cryptsvc
   exit
   Important Do not rename the Catroot folder. The Catroot2 folder is automatically recreated by Windows, but the Catroot folder is not recreated if the Catroot folder is renamed.

3. Rename the "SoftwareDistribution" folder:
1. Click Start, click Run, type %systemroot%, and then click OK.
2. Right-click the SoftwareDistribution folder, and then click Rename.
3. Type SoftwareDistribution_old, and then press ENTER to rename this folder.

4. Start the Background Intelligent Transfer Service, the Automatic Updates service, and the Event Log service. To do this, follow these steps:
1. Click Start, click Run, type cmd, and then click OK.
2. At the command prompt, type the following commands, and then press ENTER after each command:
   net start bits
   net start wuauserv
   exit

Error Code 80244007

This issue occurs because Windows cannot renew the cookies for Windows Update. (http://support.microsoft.com/kb/2883975)

Download and install the update rollup 2883201.

Reboot the machine and install the patches. :)

Error Code 80243004

For the successful installation of the patches Windows Update tray icon should be active.

Configure the Windows Update tray icon to show notification.

Go ahead and install the patches. :)