“Error 80070643: Windows Update encountered an unknown error”
It is common for you to encounter a Windows updater error 80070643 when trying to install some updates such as updates for Microsoft Office 2003 via Microsoft update. Typically, this error happens when there is a problem with the .NET Framework installed on the computer or some other problems with the PC. No matter what exactly the cause is, here you will get some simple solutions to repair this update error code 80070643 quickly.
There are ways for you to easily troubleshoot and fix the update problem Windows updater error 80070643 by yourself. The first step you should do is to scan and remove all PC threats from the computer. As what I have said previously, they are able to hijack some download or install job or remove some files from the PC. Immediately run your antivirus program to get rid of all computer infections. By the way, to always maintain computer performance, it is best that you should let your computer protection program always running in the background.
Sometimes, your firewalls settings can also lead to the error code 80070643 in installing some updates. That is, the firewall may stop the latest updates from being installed on your computer. So, after restarting the computer into normal mode, turn off your firewall by going to Control Panel, then the security option & disable the firewall. After disabling the firewall, you can re-install the update again to see whether the error code 80070643 has gone or not.
Then, you can locate and re-run the failed updates again to see whether it works. You can do this easily by going to: Start -> Control Panel -> Windows Update -> View Update History. If you are able to locate the failed in this list, directly download and try to install it again. Sometimes, a re-download and re-install job will get rid of the Windows update error code 80070643 easily.
If you still have no luck to fix the error code 80070643 with the above steps, take several minutes to check and re-register the Dll files required to run Windows update. In many cases, if there is something wrong with a file that required to install the update, you will also come to the chance to get a Windows update error message. To do this, go to Start, Run, and type in “CMD” without the quotes and press enter. Once the window appears, enter the following entries one by one:
Regsvr32 /s wuapi.dll
regsvr32 /s wuaueng.dll
regsvr32 /s wups.dll
regsvr32 /s wups2.dll
regsvr32 /s wuwebv.dll
regsvr32 /s wucltux.dll
regsvr32 /s wudriver.dll
If all solutions above do not help to get rid of Windows update error code 80070643, I can bet that the problem exists in the computer itself. At this time, you should clean the Windows registry. There is a possibility that the registry can get corrupt as some of the files get damaged and stop you from installing updates correctly. We know that the files get accumulated in the registry every time a program is run. This is why the computer registry can be very easy to get corrupted. So, you can download a registry cleaning software to thoroughly scan and fix all registry errors automatically. By the way, even though you can clean the registry manually, this may bring in some risks of losing valuable files from the registry.
Just bear in mind that a frequent Windows update process is need to maintain the stable running of the computer even though you might come to the chance to get some errors such as Windows update error code 80070643. Do not ignore the code and directly follow the above steps, you will easily get all desired updates installed successfully.
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