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I'd like to let windows auto update enabled, but block a specific patch that causes us problems from being installed.

Is that possible? Anyone knows how to do that?

Thanks

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3 Answers

In a larger network you will want to use WSUS as DanBig pointed out. However, if you owant to block an individual hot fix you can do so with the hot fix ID using this script:

If Wscript.Arguments.Count = 0 Then
    WScript.Echo "Syntax: HideWindowsUpdate.vbs [Hotfix Article ID]" & vbCRLF & _
                 "Examples:" & vbCRLF & _
                 "  - Hide KB940157: HideWindowsUpdate.vbs 940157"
    WScript.Quit 1
End If

Dim hotfixId
hotfixId = WScript.Arguments(0)

Dim updateSession, updateSearcher
Set updateSession = CreateObject("Microsoft.Update.Session")
Set updateSearcher = updateSession.CreateUpdateSearcher()

Wscript.Stdout.Write "Searching for pending updates..." 
Dim searchResult
Set searchResult = updateSearcher.Search("IsInstalled=0")

Dim update, kbArticleId, index, index2
WScript.Echo CStr(searchResult.Updates.Count) & " found."
For index = 0 To searchResult.Updates.Count - 1
    Set update = searchResult.Updates.Item(index)
    For index2 = 0 To update.KBArticleIDs.Count - 1
        kbArticleId = update.KBArticleIDs(index2)
        If kbArticleId = hotfixId Then
            WScript.Echo "Hiding update: " & update.Title
            update.IsHidden = True
        End If        
    Next
Next

If the update is not linked to an KB article then you would need to find the update ID using this script:

Dim updateSession, updateSearcher
Set updateSession = CreateObject("Microsoft.Update.Session")
Set updateSearcher = updateSession.CreateUpdateSearcher()

Wscript.Stdout.Write "Searching for pending updates..." 
Dim searchResult
Set searchResult = updateSearcher.Search("IsInstalled=0")

Dim update, kbArticleId, index, index2
WScript.Echo CStr(searchResult.Updates.Count) & " found."
For index = 0 To searchResult.Updates.Count - 1
    Set update = searchResult.Updates.Item(index)
    WScript.Echo update.Identity.UpdateID & ": " & update.Title
Next

And block it using this script:

If Wscript.Arguments.Count = 0 Then
    WScript.Echo "Syntax: HideWindowsUpdateById.vbs [Update ID]" & vbCRLF & _
                 "Examples:" & vbCRLF & _
                 "  - Hide KB940157: HideWindowsUpdateById.vbs 2ba85467-deaf-44a1-a035-697742efab0f"
    WScript.Quit 1
End If

Dim updateId
updateId = WScript.Arguments(0)

Dim updateSession, updateSearcher
Set updateSession = CreateObject("Microsoft.Update.Session")
Set updateSearcher = updateSession.CreateUpdateSearcher()

Wscript.Stdout.Write "Searching for pending updates..." 
Dim searchResult
Set searchResult = updateSearcher.Search("UpdateID = '" & updateId & "'")

Dim update, index
WScript.Echo CStr(searchResult.Updates.Count) & " found."
For index = 0 To searchResult.Updates.Count - 1
    Set update = searchResult.Updates.Item(index)
    WScript.Echo "Hiding update: " & update.Title
    update.IsHidden = True
Next

You can do all of the above in Windows PowerShell as well. I created the scripts in VBScript originally because I wanted to interact with the Windows Update Agent before PoSH was installed. The Windows Update API is documented on MSDN.

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If you are using WSUS, you can decline an update. I don't know of a way to do it otherwise.

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Within the Windows Update application (on Vista and 7), right-click the update you want to block and select "Hide Update". This will remove it from the list and block installing it during automatic installation. You can "restore" the hidden update any time in the future so it will appear back on the list.

There is a similar process on the older style Windows Update web site (for Windows XP) where you can hide an update. The option to do so is in different place though.

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