I tried to install an update from Windows and i got the following error:

Code 80070490 "Windows Update encountered an unknown error"

does anyone know what to do so i don't get this error and the update installs?

thanks in advance

Hi for that error Microsoft recommends that you run SFC.
Sometimes, some of the windows protected files can be lost or changed. To detect any problems run the program “System File Checker” (SFC). Before you run it you should purge your PC’s cache:-

Go to “START”
Click “RUN”
Type or “copy and paste”.. sfc.exe /purgecache

Note:- the space after “exe”.

The “purgecache” in this command will empty the cache before you run the file checker. You should always purge the cache before scanning with the System File Checker (SFC). That way, you can be sure that system files are copied from your Windows installation media, and are not infected with malware or corrupted. After the cache has been purged, run System File Checker.

Go to “START”
Click “RUN”
Type or “copy and paste”… sfc.exe /scannow

Note:- the space after “exe”. You may be required to use your installation disk.

This could take a long time to complete, when finished, reboot and see if the problem still exists.

Do you have pirated copy of OS? If yes than you cant update your OS.

Do you have pirated copy of OS? If yes than you cant update your OS.

no it's not a pirated version

This is a commain error, sometimes the file could be courpted or their is something else installed preventing you to intall your upades in my experance

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Installing and uninstalling Driver Robot is easy and safe. Follow these detailed instructions to install the software, run it, and then remove it when you're finished.

How to download & install Driver Robot
To start the automatic driver updating process, you first need to download the Driver Robot setup file from here: Driver Robot setup (executable, 5.1MB). The setup file will take 20-30 seconds to download on to your computer. When it is finished, find it on your computer and run it.
Once Driver Robot's setup program is running, you should see a screen welcoming you to the installer. Press "Next" to continue to the End User License Agreement (EULA). You have to say "Yes" to this agreement in order to proceed; press "Next" when you're ready.
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If you no longer need Driver Robot on your computer, just uninstall it - it only takes 30 seconds. Find the folder in your "Start" menu, under "All Programs", that's called "Driver Robot". In this folder, there will be an icon labeled "Uninstall" or "Uninstall Driver Robot".
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