Removal Guide – How to Uninstall PowerShell 1.0 Completely

December 9, 2011

Windows PowerShell is Microsoft’s task automation framework, if you are using PowerShell 1.0 in your computer, you may want to update it to the latest version of 2.0 CTP3. However if you didn’t uninstall the previous versions of PowerShell, the 2.0 CTP won’t install and but bring you the below error:

Since PowerShell is a bit different from other program, it is not displayed in the add/remove program list, you have to uninstall it through Installed Updates list. Here is methods to uninstall PowerShell 1.0:

Remove PowerShell 1.0 from the Show Updates list

Go to start menu, click control penal.
Click Add/Remove applet in the control penal window.

(For Windows Vista/7 user, select Uninstall a Program Under the Programs category)
Click “Show Updates” as below.

Find out PowerShell 1.0, select it and click the Remove button on the right side.
Follow the prompt to uninstall.
Restart your computer after finished.

If you can not find PowerShell 1.0 in the Add/Remove applet, you may reach the Powershell 1.0 Uninstaller in the below location.
C:\WINDOWS\$NtUninstallKB926139-v2$\spuninst\spuninst.exe
C:\WINDOWS\$NtUninstallKB926139$\spuninst\spuninst.exe

Uninstall PowerShell 1.0 with Max Uninstaller (recommended)

Max Uninstaller is a powerful uninstaller software developed by experienced programmer, it is the end choice to remove any hard-to-remove program in your computer down to the all the related trace. If the above step of removing PowerShell 1.0 turned out fail for you, just go for Max Uninstaller, here is how Max Uninstaller can help you uninstall PowerShell 1.0 easily and automatically:

Please click the button to download Max Uninstaller first
Step 1: Double click Max Uninstaller icon and follow the instruction to install it in your computer.

Step 2: Launch Max Uninstaller, check PowerShell 1.0 on the right hand list. Press “Run Analysis”

Step 3: Max Uninstaller will review uninstall program files and associated registry entries. Click Complete Uninstall to start the program uninstall process.

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Step 4: Click Yes to start PowerShell 1.0 uninstall.

Step 5: Wait for the standard PowerShell 1.0 uninstall completed. Click Scan Leftovers.

Step 6: Max Uninstaller will conduct a full scan on your computer for a few minutes. When it finish scanning, click Delete Leftovers to thoroughly remove PowerShell 1.0 and remove its leftovers.