How do I reset Windows Update components?

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<p><a href="http://go.microsoft.com/?linkid=9767096&amp;entrypointid=MATSKB">Run now</a></p>  <p>The <b>Automatically diagnose and fix common problems with Windows Update</b> troubleshooter may automatically fix the problem described in this article. </p>  <p>This troubleshooter fixes many different problems. <a href="http://support.microsoft.com/mats/windows_update/">Learn more</a></p>  <p>(http://support.microsoft.com/mats/windows_update/) </p>  <p>&lt;/TD&quot;&gt;</p>  <p><a></a></p>  <p><a>Run now</a></p>  <p><img src="http://support.microsoft.com/library/images/support/cn/icon_error_sml.png" /><strong>We're sorry, but your operating system is not supported by Microsoft Automated Troubleshooting Services at this time.</strong></p>  <p><b>Note</b> If you would rather fix this problem yourself, go to the &quot;<a href="http://support.microsoft.com/kb/#LetMeFixItMyselfAlways">Let me fix it myself</a>&quot; section.    <br /><a></a></p>  <p><a href="http://support.microsoft.com/kb/#top"><img alt="" src="http://support.microsoft.com/library/images/support/en-us/uparrow.gif" />Back to the top</a> | <a href="http://support.microsoft.com/kb/#survey">Give Feedback</a></p>  <h4><img src="http://support.microsoft.com/library/images/support/en-us/20x20_grey_minus.png" /><a href="http://support.microsoft.com/kb/">Let me fix it myself</a></h4>  <p><b>Important</b> This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base: </p>  <p><a href="http://support.microsoft.com/kb/322756">322756</a></p>  <p>(http://support.microsoft.com/kb/322756/ ) </p>  <p>How to back up and restore the registry in Windows</p>  <p><a href="http://support.microsoft.com/kb/">Click here to view or hide detailed information</a></p>  <p>To reset the Windows Update components, follow these steps:</p>  <ol>   <li>Open a Windows Command Prompt Windows. To open a command prompt, click <strong>Start </strong>and then click <strong>Run</strong>. Copy and paste (or type) the following command in the <strong>Open </strong>box and then press ENTER:       <br />cmd</li>    <li>Stop the BITS service and the Windows Update service. To do this, type the following commands at a command prompt. Press ENTER after you type each command.      <ul>       <li>net stop bits</li>        <li>net stop wuauserv</li>     </ul>   </li>    <li>Delete the qmgr*.dat files. To do this, type the following command at a command prompt, and then press ENTER:      <p>Del &quot;%ALLUSERSPROFILE%Application DataMicrosoftNetworkDownloaderqmgr*.dat&quot;</p>   </li>    <li>If this is your first attempt at resolving your Windows Update issues by using the steps in this article, go to step 5 without carrying out step 4. Step 4 should only be performed at this point in the troubleshooting if you cannot resolve your Windows Update issues after following all steps but step 4. The steps in step 4 are also performed by the &quot;Aggressive&quot; mode of the Fix it Solution above:      <ol>       <li>Rename the following folders to *.BAK:          <ul>           <li>%systemroot%SoftwareDistributionDataStore </li>            <li>%systemroot%SoftwareDistributionDownload </li>            <li>%systemroot%system32catroot2</li>         </ul> To do this, type the following commands at a command prompt. Press ENTER after you type each command.           <ul>           <li>Ren %systemroot%SoftwareDistributionDataStore *.bak</li>            <li>Ren %systemroot%SoftwareDistributionDownload *.bak</li>            <li>Ren %systemroot%system32catroot2 *.bak</li>         </ul>       </li>        <li>Reset the BITS service and the Windows Update service to the default security descriptor. To do this, type the following commands at a command prompt. Press ENTER after you type each command.          <ul>           <li>sc.exe sdset bits D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;AU)(A;;CCLCSWRPWPDTLOCRRC;;;PU)</li>            <li>sc.exe sdset wuauserv D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;AU)(A;;CCLCSWRPWPDTLOCRRC;;;PU)</li>         </ul>       </li>     </ol>   </li>    <li><a></a>Type the following command at a command prompt, and then press ENTER:       <p>cd /d %windir%system32</p>   </li>    <li>Reregister the BITS files and the Windows Update files. To do this, type the following commands at a command prompt. Press ENTER after you type each command.      <ul>       <li>regsvr32.exe atl.dll</li>        <li>regsvr32.exe urlmon.dll</li>        <li>regsvr32.exe mshtml.dll</li>        <li>regsvr32.exe shdocvw.dll</li>        <li>regsvr32.exe browseui.dll</li>        <li>regsvr32.exe jscript.dll</li>        <li>regsvr32.exe vbscript.dll</li>        <li>regsvr32.exe scrrun.dll</li>        <li>regsvr32.exe msxml.dll</li>        <li>regsvr32.exe msxml3.dll</li>        <li>regsvr32.exe msxml6.dll</li>        <li>regsvr32.exe actxprxy.dll</li>        <li>regsvr32.exe softpub.dll</li>        <li>regsvr32.exe wintrust.dll</li>        <li>regsvr32.exe dssenh.dll</li>        <li>regsvr32.exe rsaenh.dll</li>        <li>regsvr32.exe gpkcsp.dll</li>        <li>regsvr32.exe sccbase.dll</li>        <li>regsvr32.exe slbcsp.dll</li>        <li>regsvr32.exe cryptdlg.dll</li>        <li>regsvr32.exe oleaut32.dll</li>        <li>regsvr32.exe ole32.dll</li>        <li>regsvr32.exe shell32.dll</li>        <li>regsvr32.exe initpki.dll</li>        <li>regsvr32.exe wuapi.dll</li>        <li>regsvr32.exe wuaueng.dll</li>        <li>regsvr32.exe wuaueng1.dll</li>        <li>regsvr32.exe wucltui.dll</li>        <li>regsvr32.exe wups.dll</li>        <li>regsvr32.exe wups2.dll</li>        <li>regsvr32.exe wuweb.dll</li>        <li>regsvr32.exe qmgr.dll</li>        <li>regsvr32.exe qmgrprxy.dll</li>        <li>regsvr32.exe wucltux.dll</li>        <li>regsvr32.exe muweb.dll</li>        <li>regsvr32.exe wuwebv.dll</li>     </ul>   </li>    <li>Reset Winsock. To do this, type the following command at a command prompt, and then press ENTER:      <p>netsh reset winsock</p>   </li>    <li>If you are running Windows XP or Windows Server 2003, you have to set the proxy settings. To do this, type the following command at a command prompt, and then press ENTER:      <p>proxycfg.exe -d</p>   </li>    <li>Restart the BITS service and the Windows Update service. To do this, type the following commands at a command prompt. Press ENTER after you type each command.      <ul>       <li>net start bits</li>        <li>net start wuauserv</li>     </ul>   </li>    <li>If you are running Windows Vista or Windows Server 2008, clear the BITS queue. To do this, type the following command at a command prompt, and then press ENTER:      <p>bitsadmin.exe /reset /allusers</p>   </li>    <li>Install the latest Windows Update Agent. For more information, click the following article number to view the article in the Microsoft Knowledge Base:      <p><a href="http://support.microsoft.com/kb/949104">949104</a></p>      <p>(http://support.microsoft.com/kb/949104/ ) </p>      <p>How to obtain the latest version of the Windows Update Agent to help manage updates on a computer</p>   </li>    <li>Restart the computer.</li> </ol>  <p><a></a></p>  <p><a href="http://support.microsoft.com/kb/#top"><img alt="" src="http://support.microsoft.com/library/images/support/en-us/uparrow.gif" />Back t

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