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One of my Windows 7 updates (Platform update for Windows 7 64bit) failed to install. It is an optional update but I want it to install anyway. I think since the update failed I have problems opening https websites in Chrome.

How can I rerun the installation of the update? I can't find a button or something else to do that. It is simply listed as failed in my Windows Update History.

If I download the update manually (KB2670838) and run it, it says the update is already installed.

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You think you have the problem? Do you actually have the problem and think its because of the update or do you think you have the problem? The two statements are different. If the installer says its already installed then its already installed, so I would try to uninstall it, see if that helps. – Ramhound Mar 9 '13 at 12:54
Like in my question stated, the update is listed as failed. I think I have https problems because of the failed update. But it doesn't really matter. I just want to install it again. – juergen d Mar 9 '13 at 14:10
Your question is not clear thus the reason I am asking the questions. Verify the update was never actually installed. – Ramhound Mar 9 '13 at 14:13
@Ramhound: Your hint brought me to the "Installed updates" dialog which I wasn't aware of before. I could deinstall the update and reinstall it manually. – juergen d Mar 9 '13 at 16:07

Googling reinstalling failed windows update turned up a number of possible answers, including this page which points out "If an update has failed to install in the past but it's listed in Installed Updates now, you don't need to "reinstall" it."

Start by checking if the update is currently installed. It may be that the failed update worked on a later attempt. That would explain why downloading the update manually reports that it is already installed.

However it may be that the installation didn't install correctly. This post has a long, and fairly complicated, procedure that may help. I haven't used it though and you will have to work out it's value for yourself.

I think since the update failed I have problems opening https websites in Chrome.

Start by checking if you have the same problems using Internet Explorer or Firefox. If the problem persists then the Windows update may be the source of the problem. If not, you've got a Chrome problem than needs investigating.

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What would be an easy solution to see which of the items in the "Failed Update" list are also inside the "Installed Updates" list? There doesn't seem to be any easy way besides manually one-by-one comparison.... – Pacerier Apr 21 '15 at 22:54
up vote 2 down vote accepted

Go to

Windows Update -> Update History -> Installed Updates

and deinstall the update. After that you can reinstall it manually.

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Sometimes downloaded files are/become corrupted. In this situation, you can delete downloaded files and force Windoes update to redownload them.

So, here’s what you do:

  1. Open Explorer
  2. Go to C:\Windows\SoftwareDistribution\Download
  3. Select all the files in this Download directory, and delete them
  4. Rerun Windows Update

Wasn’t that easy? Of course it was.

From here:

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If there has not been a successful update following the failed one, go to Troubleshooting from Control Panel or Action Center (or type it in the Start Search box). There is a Windows Update troubleshooter that you can run.

There is also a Fix it.

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Try the following:

Stop the windows update service.

Delete the SoftwareDistribution folder inC:\Windows.

Start the windows update service

Rerun the check for updates.

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Windows Update will show it again as an available update, or you can just manually run update from the Control Panel menu.

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