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how can I fix broken IIS on Windows 7 ?

Deinstalling it via "Windows Features" doesn't help. Apparently it doesn't uninstall IIS completely so on my subsequent attempts to install it installer hangs and I can see in Process Explorer that it keeps trying to launch svchost.exe -iis for 10 mins and then gives me error message.

Reinstalling whole Windows with all apps would take me another 3 days :/

Please help.

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    What is the error message?
    – shufler
    Commented Feb 16, 2012 at 1:10
  • The message is very informative as it's often the case in MS products :) "An error has occurred. Not all of the features were successfully changed!"
    – expert
    Commented Feb 16, 2012 at 1:11
  • Are there events in the application or system logs that occur around the same time you try to add the IIS feature?
    – shufler
    Commented Feb 16, 2012 at 1:16
  • If installing it in OptionalFeatures.exe fails, then maybe it is because of missing/corrupt files. Even though it is a clichéd and lazy cop-out that I despise, it really does apply here: try running sfc /scannow to verify your installation files, and then check %windir%\Logs\CBS\CBS.log (you may want to delete or empty the file first).
    – Synetech
    Commented Feb 16, 2012 at 3:39

2 Answers 2

Reset to default
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I found this on the internet some time ago.
1. Unistall IIS
2. Uninstall (Windows Process Activation Service)
3. Reboot
4. Install IIS again.

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    Welcome to SuperUser! Please consider adding your source.
    – Lorenzo Von Matterhorn
    Commented Sep 16, 2013 at 16:50
  • uninstalling Windows Process Activation Service helped me. Thank You
    – Vahid2023
    Commented Feb 23, 2021 at 8:09
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Old post!!. But sometimes this will help someone to save his time. This seems to be a framework error.Reinstalling framework will solve this issue. Reinstall framework by going to control panel > Turn windows features on/off > Microsoft .NET Framework xxx

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