When you try to install updates from the Windows Update site or Microsoft Update, you may receive one of the following error codes;

• 0X80070643 or 0x643

This problem occurs when Windows Installer encounters an error.

Be aware that you can cause permanent damage to your computer system if the 0X80070643 error is left unrepaired.

To resolve this issue use the programs listed below to repair and update the problem.

Download and install them one at a time, so as not to cause conflicts;

1. Download Driver Software Update - updates the drivers that control your computer.
2. Download Error 0x80070643 Fix - helps fix 0x80070643 on your system.
   

Sometimes 0x80070643 errors can be caused by spyware and viruses, so it's recommended you run a program like the one below to check and remove any infections it finds.

• Download Spyware Scan - scans and removes any spyware, viruses or adware on your PC.

To start the installation immediately, click Open or Run this program from its current location. Or to save the download to your computer for installation at a later time, click Save or Save this program to disk.

Once installed, run each program by pressing its scan/update button. Once the checks are done, you can let the tools fix the problem or use their reports to repair it yourself.

Or Get Free Support From A Certified Technician

If you'd like to get free support from one of our experts instead, please enter your name, error message code (in this case 0X80070643) and email address into the form below and one of our certified technicians will get back to you personally within 30 minutes.

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0x80070643
The error codes are the way of communication which gives us information related to the errors that occur in any exact applications. We become capable to identify the error in hardware, software or sometimes due to entry of wrong data by us. Some of the Software does not have proper exception handling though there are definite inbuilt programs (for exception handling) in many of the software. There is dissimilarity between the error code and the return code (but both are terms of error handling mechanism), they are confused by most of the individuals. These codes are general terms used in Microsoft Windows OS.
There are several people who are facing the error and receive the code given below: 0x80070643.
This problem comes into view repeatedly to numerous users. Nobody came to know the root cause of why this is happening. It is not just one machine on which it is happening but it is happening in a large environment where it becomes a really hurting to fix.
Enterprise customers can obtain support for security updates through their common support contacts.
Symptoms:
Whenever you try to install an update version of the following:

• The Microsoft .NET Framework 1.0
• The Microsoft .NET Framework 1.1
• The Microsoft .NET Framework 2.0
• The Microsoft .NET Framework 3.0
• The Microsoft .NET Framework 3.5

You may obtain the subsequent Microsoft Windows Update error code: 0x643 or, you may obtain the following Microsoft Windows Installer error code: 1603. That means it does not allow you to update the above mention versions of Microsoft .NET.
This problem may possibly occur when you use certain system configurations.
Causes:
Windows Update error code "0x643" and Windows Installer error code "1603" are general and common error codes. Normally, the meaning of these error codes is that the update was not installed. Regularly the main cause of these errors codes is by a corruption in the .NET Framework installation or sometimes by an irregularity on the MSI database state.

That means this problem happens when Windows Installer face some error. Windows Installer gives the Error code 0x80070643 and error code 0x643 and displays them on the screen. These error codes fundamentally state that an error was come across by Windows Installer.

The following error message may be displayed on your monitor when you attempt to carry out Microsoft Windows Server Update Services (WSUS) setup on it:
Error 0x80070643: Fatal error during installation.
Additionally, if you open the Wsusca.txt file you will find information which indicates that you are the user who does not have the required rights to perform the task and therefore the setup cannot complete.
Sometime Error code 0x80070643 occurs because WSUS Setup has not given the System Administrator permission to the Microsoft SQL Server. Without these permissions the Microsoft SQL Server cannot perform the installation.
Error 0x80070643: Windows Server Update Services could not install MSDE 2000 Desktop Engine
Error 0x80070643 translates to ERROR_INSTALL_FAILURE. You see this error if you are installing WSUS from a Network Share, UNC or if due to insufficient rights on %systemdrive%.