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Error when installing PowerShell 2.0

Posted on 2010-09-22
Medium Priority
Last Modified: 2016-01-13
Hello everybody,

I am trying to install Powershell 2.0 on my Windows XP SP3 workstation, but I am getting the following error message:

"Setup cannot proceed. Windows Management Framework Core is already installed on your system."

I thought I had to unistall Powershell 1.0, but I cannot see it in the list of installed software.

Any ideas?

Thank you in advance

Question by:msartoris
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Expert Comment

ID: 33737034
To remove Powershell go to add/remove programs and tick show updates option. This should show powershell as being installed. You can then remove. If this doesn't work go to C:\Windows and look for \$NtUninstallKB926139$\spuninst\spuninst.exe. Run this and it should remove Powershell 1.0 (Also look for KB926140 and KB926141 (although these may be server 2003 specific?)

Author Comment

ID: 33742197
The add/remove program list (with the show updates option checked) does not show a Powershell entry, nor can I find the files that you have mentioned, they have probably already being uninstalled.

Expert Comment

ID: 33742259
Try installing Powershell 1.0 again. Here's a link to the download page :http://www.microsoft.com/downloads/en/details.aspx?FamilyID=6ccb7e0d-8f1d-4b97-a397-47bcc8ba3806

Then try to uninstall using the above methods.
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Author Comment

ID: 33745377
I tried but without success. The error message I get when installing Powershell 1.0 is the following:

"Cannot install this version of the product. You must first remove anyearlier versions of Windows PowerShell 1.0 before you caninstall this version. Please click OK to close the setup wizard. Next open the Add/Remove Programs Control Panel, uninstall any versions of the Windows Powershell 1.0 and run the WIndows PowerShell 1.0 setup again."

Now, as I was telling you before, I don't have any Powershell entriy in the Add/Remove Programs item list.

Expert Comment

ID: 33752003
Does this path exist?
If so run spuninst.exe.

If this doesn't work try the following:
Delete powershell registry entry HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\PowerShell
(If you can't delete them change the Install value from 1 to 0.)
Delete the powershell directory.
Then try installing again.

Author Comment

ID: 33780774
The path you mentioned does not exist. I did delete the registry key and I could install and uninstall powershell 1.0.
But then when I installed Powershell 2.0 I get the error message

"Setup cannot proceed. Windows Management Framework Core is already installed on your system"


Accepted Solution

x3man earned 2000 total points
ID: 33852152
Sounds like it is already installed.

Check that KB968930 Windows management Framework which includes Powershell 2 (see http://www.microsoft.com/downloads/en/details.aspx?FamilyId=60cb5b6c-6532-45e0-ab0f-a94ae9ababf5&displaylang=en) is not already installed.

Go to control panel/Add or Remove Programs and make sure Show Updates is checked. Look for "Windows management Framework Core". If it's there then you already have Powershell 2 installed.

Author Comment

ID: 33852519
"Windows Management Framework Core" was there, but Powershell was not working. I uninstalled it and re-installed it again, and now Powershell is working.

Expert Comment

ID: 41409874
I found that the local Administrators group did not not have Full Control of the registry key HKLM\Software\Microsoft\Windows NT\CurrentVersion\Svchost .
This fixed my issue....hope this is help to you.

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