diff --git a/src/GitPrompt.ps1 b/src/GitPrompt.ps1
index 3732831f3..010af199c 100644
--- a/src/GitPrompt.ps1
+++ b/src/GitPrompt.ps1
@@ -112,16 +112,7 @@ $global:GitPromptSettings = [pscustomobject]@{
     TruncatedBranchSuffix                       = '...'
 }
 
-# PowerShell 5.x only runs on Windows so use .NET types to determine isAdminProcess
-# Or if we are on v6 or higher, check the $IsWindows pre-defined variable.
-if (($PSVersionTable.PSVersion.Major -le 5) -or $IsWindows) {
-    $currentUser = [Security.Principal.WindowsPrincipal]([Security.Principal.WindowsIdentity]::GetCurrent())
-    $isAdminProcess = $currentUser.IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)
-}
-else {
-    # Must be Linux or OSX, so use the id util. Root has userid of 0.
-    $isAdminProcess = 0 -eq (id -u)
-}
+$isAdminProcess = Test-Administrator
 
 $adminHeader = if ($isAdminProcess) { 'Administrator: ' } else { '' }
 
diff --git a/src/Utils.ps1 b/src/Utils.ps1
index 665680a28..8a96e982d 100644
--- a/src/Utils.ps1
+++ b/src/Utils.ps1
@@ -54,6 +54,18 @@ function Invoke-Utf8ConsoleCommand([ScriptBlock]$cmd) {
     }
 }
 
+function Test-Administrator {
+    # PowerShell 5.x only runs on Windows so use .NET types to determine isAdminProcess
+    # Or if we are on v6 or higher, check the $IsWindows pre-defined variable.
+    if (($PSVersionTable.PSVersion.Major -le 5) -or $IsWindows) {
+        $currentUser = [Security.Principal.WindowsPrincipal]([Security.Principal.WindowsIdentity]::GetCurrent())
+        return $currentUser.IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)
+    }
+
+    # Must be Linux or OSX, so use the id util. Root has userid of 0.
+    return 0 -eq (id -u)
+}
+
 <#
 .SYNOPSIS
     Configures your PowerShell profile (startup) script to import the posh-git
@@ -65,7 +77,12 @@ function Invoke-Utf8ConsoleCommand([ScriptBlock]$cmd) {
 .PARAMETER AllHosts
     By default, this command modifies the CurrentUserCurrentHost profile
     script.  By specifying the AllHosts switch, the command updates the
-    CurrentUserAllHosts profile.
+    CurrentUserAllHosts profile (or AllUsersAllHosts, given -AllUsers).
+.PARAMETER AllUsers
+    By default, this command modifies the CurrentUserCurrentHost profile
+    script.  By specifying the AllUsers switch, the command updates the
+    AllUsersCurrentHost profile (or AllUsersAllHosts, given -AllHosts).
+    Requires elevated permissions.
 .PARAMETER Force
     Do not check if the specified profile script is already importing
     posh-git. Just add Import-Module posh-git command.
@@ -76,7 +93,7 @@ function Invoke-Utf8ConsoleCommand([ScriptBlock]$cmd) {
     Updates your profile script for the current PowerShell host to import the
     posh-git module when the current PowerShell host starts.
 .EXAMPLE
-    PS C:\> Add-PoshGitToProfile -AllHost
+    PS C:\> Add-PoshGitToProfile -AllHosts
     Updates your profile script for all PowerShell hosts to import the posh-git
     module whenever any PowerShell host starts.
 .INPUTS
@@ -91,6 +108,10 @@ function Add-PoshGitToProfile {
         [switch]
         $AllHosts,
 
+        [Parameter()]
+        [switch]
+        $AllUsers,
+
         [Parameter()]
         [switch]
         $Force,
@@ -104,9 +125,18 @@ function Add-PoshGitToProfile {
         $TestParams
     )
 
+    if ($AllUsers -and !(Test-Administrator)) {
+        throw 'Adding posh-git to an AllUsers profile requires an elevated host.'
+    }
+
     $underTest = $false
 
-    $profilePath = if ($AllHosts) { $PROFILE.CurrentUserAllHosts } else { $PROFILE.CurrentUserCurrentHost }
+    $profileName = $(if ($AllUsers) { 'AllUsers' } else { 'CurrentUser' }) `
+                 + $(if ($AllHosts) { 'AllHosts' } else { 'CurrentHost' })
+    Write-Verbose "`$profileName = '$profileName'"
+
+    $profilePath = $PROFILE.$profileName
+    Write-Verbose "`$profilePath = '$profilePath'"
 
     # Under test, we override some variables using $args as a backdoor.
     if (($TestParams.Count -gt 0) -and ($TestParams[0] -is [string])) {
@@ -149,7 +179,6 @@ function Add-PoshGitToProfile {
 
     if (!$profilePath) {
         Write-Warning "Skipping add of posh-git import to profile; no profile found."
-        Write-Verbose "`$profilePath          = '$profilePath'"
         Write-Verbose "`$PROFILE              = '$PROFILE'"
         Write-Verbose "CurrentUserCurrentHost = '$($PROFILE.CurrentUserCurrentHost)'"
         Write-Verbose "CurrentUserAllHosts    = '$($PROFILE.CurrentUserAllHosts)'"