Fix Windows Update Error 66a
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Error Code 66a .net Framework 4
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Code 643
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Update Error66A Shutting down for the night, I noticed that my 64-bit Vista machine had “Updates ready to install” for the 3rd night in a row.. which is a pretty good clue that at least one Update was failing https://techpaul.wordpress.com/2011/07/18/cure-for-windows-update-error-66a/ to install. So, I clicked on the Start button > All Programs > Windows Update http://www.personalcomputerfixes.com/general-errors/how-to-fix-windows-update-error-66a/ > “View update history“. Sure enough, in the “Status” column, I saw a “failed”.. on an Update named “Security Update for Microsoft .NET Framework 4 (KB2160841)” (also applies to KB2446708). So to find out what the problem was, I right-clicked > “View details”. What I am looking for is the “error code”. I saw that the code in this windows update case is 66A. Clicking “Get help with this error” led to several ‘solution’ suggestions – too many. So I will tell you the one that works for me. Step 1) Click Start > Control Panel > Programs and features. Step 2) Scroll down until you find Microsoft .NET Framework 4 Client Profile, and click on it, once, to “select” it (turn it blue), then click the Uninstall/Change menu button (above list). Step 3) A new windows update error window will open. Make sure the “Repair” radio button is selected, and press “next”. The automatic repair may take a few minutes to complete. Step 4) Return to Windows Update (as per Step 1) and make sure that only the “Security Update for Microsoft .NET Framework 4 (KB2160841) is checked, and click “Retry” or “Install Updates”. Now the Update should succeed. If it doesn’t, get the “standalone” installer by clicking here and choose either 32 (x86) or 64 bit (x64) to match your system. If that fails, I suggest calling Microsoft’s support number for free tech support (as this qualifies as a security issue) 1-866-PC-SAFETY. (That's right. Free. Microsoft provides free support for any safety/security related problem.) * Orig post: 4/17/11 Free offer: Folks, I just noticed that on buy.com, you can get a free 6 months of CA's (Computer Associates) antivirus + anti-spyware.. if you need some protection. Click here for details. Copyright 2007-2011 © "Tech Paul" (Paul Eckstrom). All Rights Reserved. >> Folks, don't miss an article! To get Tech - for Everyone articles delivered to your e-mail Inbox, click here, or to subscribe in your RSS reader, click here. << Share this post:EmailMoreFacebookPrintGoogleLinkedInTwitterRedditTumblrPinterestLike this:Like Loading... Related July 18, 2011 - Posted by techpaul | advice, computers, how to, Microsoft, PC, security, tech, troubleshooting, Vista, Windows, Windows 7, XP | .
of files which is used to power a lot of applications now, and is essential for many applications to run correctly on Windows. The error is caused by the Installer application for 66a not working properly - leading your computer to run much slower and with a lot of problems. To fix this issue, it's recommended that you are able to fix the .NET installer, as well as then repair the various registry errors that Windows will have. This error will typically show in this format: Security Update for .NET Framework 4 on Windows XP, Windows Server 2003, Windows Vista, Windows 7, Windows Server 2008, Windows Server 2008 R2 for x64-based Systems (KB2160841) Installation date: 12/6/2010 11:39 AM Installation status: Failed Error details: Code 66A Update type: Important What Causes Windows Update Error 66a? The .NET installer will be damaged / corrupt Windows will have problems with its settings Your PC will be outdated and have corrupted settings How To Fix Windows Update Error 66a Step 1 - Repair .NET Installation Repairing .NET will allow your computer to run much smoother, by ensuring that this part of your system is not damaged or corrupted in any way. In order to fix this, we recommend using the steps outlined here: Click on Start and click on Control panel. Go to Program and Features. Scroll down to Microsoft.Net Framework 4 Client Profile, right click it. It will give you a choice of Uninstall/Change, click it. Then, it will give a choice to Repair it, pick Repair it. It will take about 4-10 minutes to repair (with my PC) your experience may vary. When completed, go to your update center, and update it again Step 2 - Clean Out The Registry Of Your PC Download This Registry Cleaner The registry is another big cause of the Windows Update 66a error, as it's where your computer will keep