How To: Uninstall Powershell 1.0


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If you’re trying to install Powershell 2.0 CTP3 on a Windows PC with Powershell 1.0 already installed, the installation wizard will stop with the following warning.

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Before the wizard will continue, you have to uninstall Powershell 1.0.

Open Control Panel. Select Show updates and browse to Windows XP – Software Updates. Click on Remove to uninstall Powershell 1.0.

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If you don’t have an entry in the Add/Remove Programs control panel, You can find the Powershell 1.0 Uninstaller here:

  • C:\WINDOWS\$NtUninstallKB926139-v2$\spuninst\spuninst.exe
  • C:\WINDOWS\$NtUninstallKB926139$\spuninst\spuninst.exe

After uninstalling Powershell 1.0 you’re able to install Powershell 2.0 CTP3.