How to resolve Windows Vista Update error 800B0100

If you’ve tried to install recommended updates in Windows Vista, and receive error 800B0100, this tutorial offers the most common solution to that problem.

windows vista update error 800B0100

  1. The solution, in a nutshell, is to disable your firewall. If you’re using McAfee Personal Firewall Plus, F-Secure Internet Security, Norton Internet Security or another Firewall vendor, see its respective support page for assistance in disabling it (temporarily). If you’re using the built-in Vista Firewall, keep reading.

    Open the Control Panel and select Security.

  2. windows vista control panel
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  3. Select Turn Windows Firewall on or off.
  4. windows vista control panel security section
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  5. Select Off (not recommended), click Apply and then OK.
  6. windows vista firewall disabled
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  7. Back at the Windows Update screen, click the Try again button.
  8. windows vista update retry
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  9. The download(s) and installation should start…
  10. windows vista update manager
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  11. and this time successfully install. If a restart is required, make sure to re-enable your Firewall once your PC restarts.
  12. windows vista update manager successfully updated
    click to enlarge

  13. Though this solution will work for most Vista Update errors, see the Microsoft search results for the error 800B0100 if it doesn’t work for you.
{ 36 comments… add one }
  • Skysurfer November 1, 2008, 4:09 am

    I have been reading up on this issue for a long time now. I have two Dell machines – an Inspiron Laptop and a Dimension 9150 Server.

    My laptop upgraded to Sp1 with no problems at all. The Dimension however has been a bit of a pig and I have seen this 800B0100 code for a good long time.

    I have tried pretty much every step I could find, both here on TechNet and elsewhere. Nothing worked.

    edit: Not for nothing, but I am not some noob either, I have been in the industry for 15 years and some of the KB articles offered as resolutions are a complete nightmare even for a *ahem* talented professional, so I’d hate to know how someone without any real experience would cope…

    What I did was quite simple really, a little bit of a pain to accomplish but it’s RESOLVED THE ISSUE FOR ME.

    I simply performed an “in-place upgrade” i.e. re-installed Vista and used the upgrade option.
    Then came the nightmare…

    After re-installing, I ran Windows update and let nature take it’s course…

    After about 6-10 updates and reboots, I was finally offered SP1, which I was finally able to download and install.

    Hope someone, somewhere finds this helpful because I have seen a lot of you out there still struggling with this one.

  • Ian November 10, 2008, 4:33 am

    Neither of these fixes worked in my particular case however I found another solution. If neither of the above fixes work for you try searching for the update that keeps failing manually. In my case it was KB938123. Every time I tried to update I got the above error message. I searched for ‘download KB938123’ on google and downloaded it to my desktop from the microsoft web site. I then performed a normal manual install. After that the laptop downloaded updates normally.

  • jorge morais February 25, 2009, 9:50 am

    Olá. Já tentei efectuar da forma como indicam mas nada feito, continua na mesma, na conseguem instalar a actualização.


  • cathy March 6, 2009, 8:54 pm


  • April 6, 2009, 7:30 pm


  • daniiel July 28, 2009, 2:47 pm

    aqui não funcionou e continuou dando o erro 800b0100

  • FallOutBoy September 6, 2009, 2:09 am

    He seguido esos pasos y nada, me sale el mismo error

  • Dan November 4, 2009, 6:49 am

    I had already disabled my firewall by stopping the service entirely. It actually turned out that i coulnt install update because of this..
    Enabling the firewall service again, allowed me to continue the install.. Oddness :)

  • AngelaO November 16, 2009, 5:41 am

    Thank you very much. I temporarily turned off Windows Firewall and the update went through fine. Seems a bit odd that Windows blocks Windows update.

  • SIMON November 19, 2009, 3:35 am


    I just wanted to post a quick note on here to try to help some of the many people that, like me, have been living in the hellish underworld of Windows Updates. I suffered immense problems over the whole of the last year due to ******* ******* Vista Updates which would not install, ultimately resulting in my operating system becoming completely screwed up and me being unable to work. I tried everything on these boards and many others, I tried everything…. in the end, a friend of mine, who has less technical knowledge than me, suggested I upgrade to Windows 7. Now while I was reluctant to admit defeat – and that I had to PAY my way out the problems caused by Microsoft, by giving more money to THEM, my time is worth more than the hell I was experiencing….. so I’m here to tell you that upgrading Vista to Windows 7 was the best thing I ever did. All my problems are resolved. Computer (AND WINDOWS UPDATES) now all working perfectly and UP TO DATE. I paid about £80 (UK POUNDS) – which i think is about 40-50 US Dollars – and it was worth every penny (or cent for you).

    Just go to Microsoft site and navigate to the Windows 7 upgrade link (they’ve got it plastered everywhere of course). One word of warning – after downloading the 3 large files, when you start to install them there are several preliminary steps you have to go through – do them all very carefully – including compatibility checks and system status etc etc…. You have to plug in all your regular USB devices to make sure everything compatible – DO NOT UNPLUG THEM DURING ANY PART OF THE PROCESS OR YOU WILL HAVE TO START OVER. Oh and do a backup of your files and settings first to an external hard-drive. Then it checks your system to make sure all software and hardware is compatible. Now these processes were painfully slow for me (perhaps not helped by the fact that I appeared to be downloading from US servers to the UK), and it took the whole evening, I had to uninstall certain software too on the advice of the Windows 7 software installer (including Dell Support Centre and Dell Modem something or other – which took a LONG time itself)…. BUT, once I’d got the actual programme – Windows 7 – installing, it ran like a dream. It took a long time and in the end I just left it doing its thing and went to bed (having nightmares of another day of hell and lost earnings). In the morning – I could not believe it – it was all perfectly installed and ready to go. Just had to install the latest updates (which terrified the hell out of me of course!!!!! – but thankfully all went ok!) and then restarted and it is beautiful. Not only that, but Windows 7 absolutely ****** all over Vista, which is littered with bugs and errors and problems and will never work perfectly for long. And Windows 7 is about 2-3 times faster than Vista, apparently because it cuts out a lot of the unecessary running procedures (or something like that!). I’d recommend doing this if you’re having problems – If i’d done it a few months back i could have saved days and days of hell and $$$$$$$$ of earnings! Good luck and if you need any pointers for this process drop me a line –

  • Lenora December 9, 2009, 9:43 am

    I noticed a lot of people having the same issues that I am. Has anyone upgraded to Windows 7 without having to do a clean install?. I have Windows Vista for Business., the reason for this, the place I bought my laptop sells mostly to Businesses. Also, I have several programs I do not with to re-download. Having Multiple Sclerosis is a big issue with this. Thanks.

  • Navaira March 20, 2010, 4:52 pm

    Someone plz plz plz help me, i did so many things to remove this 800B0100 problem but it still wont get installed…..all the updates always fail to install because of this one error and i just dont know how it can be fixed…..the error code is 800B0100…plz someone help i wud really appreciate your help…thx

  • Ray March 21, 2010, 12:25 am

    Ok, everybody, here’s something that might work for you! It just did for me!!

    I opened up the log file “CheckSUR.log” located here: “C:\Windows\Logs\CBS”. I believe that this file existed because I already ran the System Update Readiness Tool (which hadn`t solved the problem). So, in the above log file, was the following phrase: “CBS Watchlist Component Missing 0x80070002”. This seemed like a possible stretch, but after searching for that number “0x80070002” I came to the following Microsoft page:
    I generally followed its instructions. Since I was doing this in Vista, I substituted “Automatic Updates service” with “Windows Update service” and ran the command prompt (cmd) with administrative privileges.
    Essentially, what I did was to rename the “SoftwareDistribution SDTemp” folder which is inside the Windows folder. I believe this caused Windows Update to rebuild the folder.
    Since I still had the Windows Update control panel open, I tried clicking the “Retry” button. The response was “updates successfully installed”. “Not needed: 3 updates”.
    When I checked for updates again, nothing seemed to be happening. Then I closed Windows Update, put the computer into standby and then woke it up again and tried checking for updates again. This time, it found (in my case) 5 updates, successfully downloading and installing them. What a relief!!! I hope that this works for you if you have been desperate for a solution.

    I generally followed the instructions

  • Navaira March 21, 2010, 2:16 pm

    OK i did what it said in the mail that was send to me….i try to rename the “windows distribution” file but that didn’t even worked…..i couldn’t change it….and also when i went to logs/CBS and try to open the notepads inside their…it said “access denied” and they were blank. i have did so many things to remove this error but nothing has worked….and i dont know wat else to do now…and now when i try to connect my mp4 player to the computer it always says “USB device not recognized” and it use to work before…..can someone plz help me…

  • chevallier June 20, 2010, 12:32 pm

    je n,arrive pas a activé mon pare feu pouvé vous faire quelque chose svp merci monsieur chevallier jean marc

  • Vindex June 26, 2010, 1:24 am

    Tengo Windows 7 home Premium, e igualmente no me anduvo este método para actualizar, ¿Tendrá que ver con el S.O.? :/

  • franco December 1, 2010, 11:19 pm
  • Darlene January 9, 2011, 2:54 am

    Thank you so very much

  • Jon December 23, 2011, 10:22 am

    Been trying to sort this problem for months, wish I’d found this sooner. Thanks for the help.

  • toni September 17, 2012, 8:50 am

    Same problem, after trying it, nothing happens…:-(

  • Nejat October 14, 2012, 3:34 pm

    thx, too. solved after month on lenovo notepag w701

  • Harshad December 31, 2012, 10:19 am

    Thanks.Direct download helped me successfully.

  • Lazza January 8, 2013, 12:42 pm

    Tried this it does not fix it

  • Raj Tilak March 1, 2013, 12:11 am

    Repair OS that worked for me,!!

  • newfolder . February 14, 2014, 12:32 pm

    it does not fix …

  • Magic June 7, 2014, 6:01 am

    Works for windows 7 as well. I looked for help at Microsoft website and they made me run tons of diagnostics which didn’t help. Your solution was quick and easy. Thank you.

  • Chris October 28, 2014, 3:19 am

    My Solution is to dump windows 7 and go to Linux zorion just like windows 7 set up but it is totally free and of charge.

  • anthony November 19, 2014, 12:10 pm

    Not true about the firewall. I have failed updates and firewall is turned off.

  • Barbaro April 20, 2015, 9:33 am

    I turned off firewall on Windows update as suggested, opened again Windows update trying to install this security update for Windows Vista for SP2 (error code 800B0100) but did not work. Can someone help with this ongoing issue

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