diff --git a/Fix-PreventWindows11Upgrade.ps1 b/Fix-PreventWindows11Upgrade.ps1
new file mode 100644
index 0000000..acc05a6
--- /dev/null
+++ b/Fix-PreventWindows11Upgrade.ps1
@@ -0,0 +1,51 @@
+# NOTE: This script will only have an effect Windows 10 Professional and Enterprise versions
+
+# Return a Powershell version object from a string
+Function Get-Version {
+    param([Parameter(Mandatory=$true)][string]$Version)
+    [int]$Sets = 4
+    $VersionArray = $Version.Split('.')
+    If ( $VersionArray.Count -le $Sets ) { $Sets = $VersionArray.Count }
+    For ($i = 0; $i -le ($Sets - 1); $i++) {
+        $Return = '{0}.{1}' -f $Return, $VersionArray[$i] }
+    Return [version]$Return.Trim('.')
+}
+
+# Compare current Windows version with a supplied version
+# The value supplied must be a string and must include at least 1 decimal
+# Use this page to match build numbers and servicing release versions: https://docs.microsoft.com/en-us/windows/release-health/release-information
+Function IsWindowsVersion {
+    param(
+        [Parameter(Mandatory=$true,ParameterSetName='gt')][string]$gt,
+        [Parameter(Mandatory=$true,ParameterSetName='ge')][string]$ge,
+        [Parameter(Mandatory=$true,ParameterSetName='lt')][string]$lt,
+        [Parameter(Mandatory=$true,ParameterSetName='le')][string]$le,
+        [Parameter(Mandatory=$true,ParameterSetName='eq')][string]$eq
+    )
+    [version]$WindowsVersion = [System.Environment]::OSVersion.Version
+    switch ($PSCmdlet.ParameterSetName) {
+        'gt' { If ( $WindowsVersion -gt (Get-Version $gt) ) { Return $true } Else { Return $false } }
+        'ge' { If ( $WindowsVersion -ge (Get-Version $ge) ) { Return $true } Else { Return $false } }
+        'lt' { If ( $WindowsVersion -lt (Get-Version $lt) ) { Return $true } Else { Return $false } }
+        'le' { If ( $WindowsVersion -le (Get-Version $le) ) { Return $true } Else { Return $false } }
+        'eq' { If ( $WindowsVersion -eq (Get-Version $eq) ) { Return $true } Else { Return $false } }
+    }
+}
+
+# Make sure we're running at least Windows 10 1803 but not higher than Windows 10 21H2
+# This is because the Group Policy setting used below was introduced in 1803, so anything before that won't have any effect
+If ( (IsWindowsVersion -ge "10.0.17134") -and (IsWindowsVersion -le "10.0.19044") ) {
+
+    # This is the version of Windows 10 you want to update to, but no further
+    $MaxWindowsVersion = "21H1"
+    
+    $BaseRegPath = "HKLM:SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate"
+    If (-not (Test-Path $BaseRegPath) ) { New-Item -Path $BaseRegPath -Force | Out-Null }
+
+    New-ItemProperty -Path $BaseRegPath -Name "ProductVersion" -Value "Windows 10" -PropertyType String -Force | Out-Null
+    New-ItemProperty -Path $BaseRegPath -Name "TargetReleaseVersion" -Value 1 -PropertyType DWord -Force | Out-Null
+    New-ItemProperty -Path $BaseRegPath -Name "TargetReleaseVersionInfo" -Value "${MaxWindowsVersion}" -PropertyType String -Force | Out-Null
+
+    # Restart the Windows Update service if it's currently running
+    If ( $(Get-Service -Name wuauserv).Status -eq "Running" ) { Restart-Service -Name wuauserv -Force -ErrorAction SilentlyContinue }
+}