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<p>The issue may be caused by several factors, such as corrupted system DLL files, a corrupted Windows Update temporary folder, or stopped update services. In order to narrow down the cause of this issue and resolve it, let&#8217;s refer to the following steps. Please access the <span style="text-decoration: underline;">Windows Update website</span> to check the result after finishing each step.</p>
<p><span style="text-decoration: underline;">NOTE:</span> Some third party programs can also affect the Windows Update service. If you are running any the third party applications such as Spyblocker, Internet or Web accelerators (programs associated to boost up the speed of the Internet connection), security or anti-virus programs (Norton, McAfee, etc.), I recommend we temporarily disable or shut them down and then try accessing the Windows Update site later. Please be sure to enable them again when completing the update process.<!--more--></p>
<p><strong>Step 1: Register DLL files</strong></p>
<p>By trying this step, we can check if the update engines are working<br />
properly.</p>
<p>1. Close all instances of Internet Explorer.<br />
2. Click Start and Run, type &#8220;<strong>REGSVR32 ATL.DLL</strong>&#8221; (without quotes) in the<br />
Open box and click OK.</p>
<p><span style="text-decoration: underline;">Note:</span> There is a space between <strong>REGSVR32</strong> and <strong>ATL.DLL<br />
</strong><br />
3. Similarly, one by one, register the files listed below:</p>
<p>REGSVR32 MSXML3.DLL<br />
REGSVR32 WUAPI.DLL<br />
REGSVR32 WUAUENG.DLL<br />
REGSVR32 WUAUENG1.DLL<br />
REGSVR32 WUPS2.DLL<br />
REGSVR32 WUCLTUI.DLL<br />
REGSVR32 WUPS.DLL<br />
REGSVR32 WUWEB.DLL<br />
REGSVR32 QMGR.DLL<br />
REGSVR32 QMGRPRXY.DLL<br />
REGSVR32 JSCRIPT.DLL<strong><br />
</strong><br />
<span style="text-decoration: underline;">Note</span>: Please try and register all the files. While registering each .DLL file you should get a &#8220;succeeded&#8221; message. If you encounter any error message, please let me know the exact wording.</p>
<p>If the issue persists, let&#8217;s move on to the steps below to verify Windows Update services and temporary folders.</p>
<p><span style="color: #003366;">Step 2: Verify the relevant Windows Update services<strong><br />
</strong></span><br />
1. Click Start->;Run, type &#8220;<span style="color: #003366;">services.msc</span>&#8221; (without quotation marks) in the open box and click OK.<br />
2. Double click the service &#8220;<span style="color: #003366;">Automatic Updates</span>&#8220;.<br />
3. Click on the Log On tab, please ensure the option &#8220;<span style="color: #003366;">Local System account</span>&#8221; is selected and the option &#8220;<span style="color: #003366;">Allow service to interact with desktop</span>&#8221; is unchecked.<br />
4. Check if this service has been enabled on the listed Hardware Profile. If not, please click the Enable button to enable it.<br />
5. Click on the &#8220;<span style="color: #003366;">General</span>&#8221; tab; make sure the &#8220;<span style="color: #003366;">Startup Type</span>&#8221; is &#8220;<span style="color: #003366;">Automatic</span>&#8220;.<br />
Then please click the button &#8220;<span style="color: #003366;">Stop</span>&#8221; under &#8220;<span style="color: #003366;">Service Status</span>&#8221; to stop the service.<br />
6. Then please click the button &#8220;<span style="color: #003366;">Start</span>&#8221; under &#8220;<span style="color: #003366;">Service Status</span>&#8221; to start the service.<br />
7. Please repeat the above steps with the other services:</p>
<p><strong>Background Intelligent Transfer Service</strong><br />
<strong> Event Log</strong></p>
<p><span style="text-decoration: underline;">Note</span><strong>:</strong> The event log service is enabled on all of the hardware profiles. This service does not have an option to enable or disable on certain hardware profile.</p>
<p>If it still does not help, let&#8217;s proceed to step 3.</p>
<p><span style="color: #003366;">Step 3: Reload the Update temporary folders</span></p>
<p>One possible cause is that the temporary folder for Windows Update contains corrupted files. Let&#8217;s erase all the files there to get the system clean.</p>
<p>1. Click Start, Run, type: cmd and press Enter. Please run the following command in the opened window.</p>
<p><strong>Net stop WuAuServ</strong></p>
<p>2. Click Start, Run, type: <strong>%windir%</strong> and press Enter.<br />
3. In the opened folder, rename the folder SoftwareDistribution to Sdold.<br />
4. Click Start, Run, type: cmd and press Enter. Please run the following command in the opened window.</p>
<p><strong>Net start WuAuServ</strong></p>
<p>By this point Windows Update should work, if not please post your issue here.</p>