Windows Vista Home Updates Not Installing

  1. I’m getting error code 646

  2. I have two versions of IE Explorer as my browser, 64 and 32 bit

  3. My gaming computer came in 64 bit which made it incompatible for gaming, so I stay away from clicking on that version and play with no probs in 32.

  4. I have googled this error code and am finding answers which advise disabling the firewall. This I have done and now…

5… I get an “unkown error code” message, and still the updates are failing. Windows Troubleshooting is useless.

  1. Computer specs: AMD Athlon 64x2 Dual Core Processor 6000+ 4Gb

  2. I have tried Mozilla/Firefox before and couldn’t use it and the only option I had was to go to system restore, so I am afraid to try this again, because I don’t want to lose my gaming ability.

  3. There’s an NVidia update available and I’d like to install it along with the 14 other updates offered, but i don’t know what else to try.

  4. I’m kinda leery about clicking on 64 bit, because it also caused all kinds of problems before (when we already had the 32) and we spent like an hour on the phone with AT&T tech support.

  5. Help, please?



If you’ve got the 64 bit version of IE available, you’re running 64 bit Vista.

On the Start Menu, you should have an option which says ‘Windows Update’ or ‘Microsoft Update’. That’s what you should be using. To use Windows Update in manual mode, you need to be logged in as an administrator. Turning off UACmay also be necessary to solve the problem.

Okay, before I mess something up, let me just tell you that the UA section has my name as the administrator, but there is no password created.

The system is telling me that if I create a password then I will lose EFS encrypted files, certificates, network and stored passwords.

How can I avoid this happening, when, according to them, if I want to turn off UA, I need a password, and also (and I know I shouldn’t have been doing this, but I thought it would help w/ my short term memory loss), is there a way to look at all the passwords I let windows “remember”, and write them down/print them out?



Here’s some more info that may help you help me, Quartz:

  1. The last sucessful update was for Microsoft Silverlight on 1/20/10. Before that date there’s a very long list (including SP II for Vista) which failed (going back to last year). Befor November of '09, everything was successful with only sporadic failures.

  2. I have nocticed that everytime Windows tried to update Office Outlook 7, it failed, and I think I know why: I have NEVER been able to accurately configure Outlook on ANY computer I have had, and all the information I have ever read on the net indicates that it’s a bitch to do, so every time I click on a “contact us” on a website, I just copy and paste the address, “x” out of the outlook prompt and write the e-mail from yahoo.

  3. Could the fact that Outlook isn’t “properly installed/configured” on my computer be causing all this mess?

I REALLY appreciate your help. Would a screen shot of all the failures for you to look at do any good?



It looks like Office 2007 is your culprit.

Could you describe your Outlook troubles in more detail? It is not especially hard to configure but there is specific info you need to set it up. Your ISP should freely provide this info (type of mail server- POP3 most likely, incoming and outgoing mail server addresses and if Secure Password Authentication is needed) and possibly even instructions on how to set it up.

It should be possible to update Outlook without configuring it first but I’ve never tried it.

You could try manually installing the updates that fail and going from there. Alternately, uninstall Office, reboot, run Windows Update and then once finished re-install Office.

Detailed advice and links to manual installers here:

Not relevant. Turning off UAC - or turning it back on - is independent from your password.

  1. Got this when I tried to uninstall Microsoft office Trial 2007: Error 25090. Office Setup encountered a problem with the Office Source Engine, system error: -2147023836. Please open SETUP.CHM and look for “Office Source Engine” for information on how to resolve this problem.

  2. Outlook Error message: The message could not be sent. You don’t have any accounts configured for sending e-mail. please verify account configuration.

  3. Microsoft Office 2007 trial has disappeared from the control panel install/uninstall list, although the compatibilty pack remains. Apparently, I now have to find the Office 2003 disc and re-install?

  4. Went to Update once again and this installed successfully: Microsoft Office Compatibility Pack Service Pack 2 (SP2)

Installation date: ‎1/‎29/‎2010 6:11 AM

Installation status: Successful

Update type: Important

Service Pack 2 provides the latest updates to the Microsoft Office Compatibility Pack.

More information:

Help and Support:

  1. Everything else (the 14 from yesterday, including my NVIDIA one:nVidia - Display - NVIDIA GeForce 9600 GT

Installation date: ‎1/‎28/‎2010 10:13 AM

Installation status: Failed

Error details: Code 80070103

Update type: Optional

nVidia Display software update released in September, 2009

More information:

Help and Support:

So… should I now not worry about the 14 failed update attempts and what about the NVIDIA one? Go their website and download from there?

Thanks for all your help, guys!:slight_smile:


You should always get your latest graphics driver from the manufacturer. Microsoft’s certification process that allows driver updates to appear on Windows Update takes forever which results in them serving up “updates” that have been obsolete for months. Windows Update offers you a version of Nvidia graphics drivers from Sept. 2009? The most current version offered by Nvidia on their website is from 11 days ago.

Also, if you try to install a driver through Windows Update and it is older than the version you already have it will spit errors out at you similar to what you have described. For the longest time Windows Update was convinced it had a better version of my network driver but it would never install because the one I already had was newer. I think I ended up hiding the update.

As for your Office dilemma, it sounds very strange. You had a trial version and now it won’t uninstall and it’s asking you to install again so you can uninstall it? Well, the good news is you can do it manually. The bad news is this is not an easy process. But if you’ve got a lot of time on your hands and you feel like digging deep into the guts of your system via rusty chainsaw, here you go:

The compatibility pack is not actually needed for 2007. It’s to make the 2007 files (docx etc) work in 2003.

For the video river, you should go directly to Nvidia.

I would suggest you be very careful about removing Office: if you remove Outlook, you may lose all your email, so back it up first!