[Forum FAQ] Common steps to start troubleshooting Windows Update issues

Question

In this article, we provide you some common steps to quickly narrow down Windows Update issues. Before you post your question, you can follow the steps below to see whether
the issue can be identified and resolved. If not, please post it in Windows 8/8.1 Forum with the analyzed details.
Scenario 1: New updates can’t be checked.
Make sure your internet connection works fine.
Make sure you could connect to Windows Update Server or Microsoft Update.
For more information about how to troubleshoot problems connecting to Windows Update or to Microsoft Update,
visit the following Microsoft Web site:
http://support.microsoft.com/kb/818018
Scenario 2: Windows Update can’t be installed or configured.
Suggestion 1: Run the
Windows Update Troubleshooter
Press
WINDOWS + X combination key to open the Control Panel;
Change its view by “Category”;
Click
Find and fix problems;
Under
System and Security entry, click Fix problems with Windows Update.
Follow the instruction to complete it.
Suggestion 2:
Make sure the following services could startup automatically
Press WINDOWS + R combination key, type “services.msc”, press
Enter;
Find out the following services and the dependent services:
Windows Update
Background Intelligent Transfer Service
Windows Modules Installer
Double click every service, on General tab, set its Startup type as “Automatic”;
Click Apply and OK button.
Note: If these services miss or damage, you need to use Windows 8/8.1 installation media restore them.
Suggestion 3:
Delete the Windows Update cache
Press
WINDOWS + R combination key, type “services.msc”, press
Enter;
Find out the
Windows Update service, right click and stop it;
Located to
C:\Windows\SoftwareDistribution;
Delete the whole
SoftwareDistribution folder.
Suggestion 4:
Reset the Windows Update component
For more information about how to
reset the Windows update component,
visit the following Microsoft Web site:
http://support.microsoft.com/kb/971058
Suggestion 5:
Install the Windows Update in a
Clean Boot state
For more information about How to perform a clean boot in Windows,
visit the following Microsoft Web site:
http://support.microsoft.com/kb/929135
Suggestion 6:
Reset, refresh or restore your PC, and then try to Windows Update
http://windows.microsoft.com/en-gb/windows-8/restore-refresh-reset-pc
Scenario 3: You might still be repeatedly offered the same update.
You need to check its installation status and decide if it should be installed again.
For more
information about Windows Update or Microsoft Update repeatedly offers the same update,
visit the following Microsoft Web site:
http://support.microsoft.com/kb/910339
Here are the solutions for some common Windows Update error codes or corresponding issues:
1. .NET Framework update installation error: "0x80070643" or "0x643"
http://support.microsoft.com/kb/976982
2. Error 0x800B0100 when you try to install Windows Updates or Microsoft Updates
http://support.microsoft.com/kb/956702/en-us
3. Error 0x80070005 in Windows Update when you try to install updates
http://support.microsoft.com/kb/968003/en-us
4. Error message 80246008
http://support.microsoft.com/kb/971058
5. Error message 80070003
Stop Windows Update service, rename SoftwareDistribution and catroot2 folder, then restart Windows Update service.
6. Error message 0x80072f8f
Check and correct PC’s Time and Date. 
7. Automatic Windows update settings is gray out.
Please locate to the below registry:
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU.
Add Value name: NoAutoUpdate
Value data: 0 or 1
0: Automatic Updates is enabled (default).
1: Automatic Updates is disabled.
Windows Store app update general troubleshooting steps
If you're unable to open the Store, try running the
Apps troubleshooter
If you can’t find the app update. Please consider these scenario:
Confirm if you set the proxy which affect the Windows store update.
For more information about using authenticated proxy servers together with Windows
8, visit the following Microsoft Web site:
http://support.microsoft.com/kb/2778122
Confirm the app is available in your current region;
Make sure “Automatically update my apps” is set to Yes;
Make sure the latest updates are installed on your PC and that your antivirus program isn't preventing the app from running.
Make sure the app isn't blocked by Windows Firewall
Sync your app licenses.
Try to clear
the Windows store cache on your PC:
Press
WINDOWS + R combination key, type “wsreset”, press
Enter;
Try to install the update again.
Applies to: Windows 8 and Windows 8.1
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Answer 1

NEW
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https://dev.windows.com/en-US/featured/hardware/windows-10-hardware-preview-tools
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