diff --git a/.gitignore b/.gitignore
index b46c39e263..722d193462 100644
--- a/.gitignore
+++ b/.gitignore
@@ -20,6 +20,7 @@ settings.json
 [Rr]eleases/
 x64/
 x86/
+arm64/
 AnyCPU/
 Fuzzing/
 bld/
diff --git a/src/VcpkgPortOverlay/CreatePortOverlay.ps1 b/src/VcpkgPortOverlay/CreatePortOverlay.ps1
index 6cda2cedff..f3ff774fb8 100644
--- a/src/VcpkgPortOverlay/CreatePortOverlay.ps1
+++ b/src/VcpkgPortOverlay/CreatePortOverlay.ps1
@@ -208,6 +208,44 @@ function Add-PatchToPortFile
     $modifiedPortFile | Out-File $portFilePath
 }
 
+# Removes all patches from portfile.cmake
+function Remove-PortPatches
+{
+    param(
+        [Parameter(Mandatory)]
+        [string]$Port
+    )
+
+    # Look for the line that says "PATCHES"
+
+    $portFilePath = Join-Path $OverlayRoot $Port "portfile.cmake"
+    $originalPortFile = Get-Content $portFilePath
+
+    $modifiedPortFile = @()
+    foreach ($line in $originalPortFile)
+    {
+        if ($line.TrimEnd().EndsWith("PATCHES"))
+        {
+            $foundPatches = $true
+        }
+        elseif ($line -eq ")")
+        {
+            $foundParen = $true
+            $modifiedPortFile += $line
+        }
+        elseif ($foundPatches -and -not $foundParen)
+        {
+            # Drop line
+        }
+        else
+        {
+            $modifiedPortFile += $line
+        }
+    }
+
+    $modifiedPortFile | Out-File $portFilePath
+}
+
 # Adds a patch to a port
 function Add-PatchToPort
 {
@@ -275,13 +313,12 @@ function Update-PortSource
         [Parameter(Mandatory)]
         [string]$Commit,
         [Parameter(Mandatory)]
-        [string]$SourceHash
+        [string]$SourceHash,
+        [string]$RefPattern = '[0-9a-f]{40}( #.*)?$'
     )
 
-    $portDir = Join-Path $OverlayRoot $Port
-
     # For the REF, we also delete any comments after it that may say the wrong version
-    Set-ParameterInPortFile $Port -ParameterName 'REF' -CurrentValuePattern '[0-9a-f]{40}( #.*)?$' -NewValue "$Commit # Unreleased"
+    Set-ParameterInPortFile $Port -ParameterName 'REF' -CurrentValuePattern $RefPattern -NewValue "$Commit # Unreleased"
     Set-ParameterInPortFile $Port -ParameterName 'SHA512' -CurrentValuePattern '[0-9a-f]{128}' -NewValue $SourceHash
 }
 
@@ -302,6 +339,10 @@ function Update-PortVersion
 New-PortOverlay cpprestsdk -Version 2.10.18 -PortVersion 4
 Add-PatchToPort cpprestsdk -PatchRepo 'microsoft/winget-cli' -PatchCommit '888b4ed8f4f7d25cb05a47210e083fe29348163b' -PatchName 'add-server-certificate-validation.patch' -PatchRoot 'src/cpprestsdk/cpprestsdk'
 
+New-PortOverlay detours -Version 4.0.1 -PortVersion 8
+Update-PortSource detours -RefPattern 'v4.0.1' -Commit '404c153ff390cb14f1787c7feeb4908c6d79b0ab' -SourceHash '1f3f26657927fa153116dce13dbfa3319ea368e6c9017f4999b6ec24d6356c335b3d5326718d3ec707b92832763ffea092088df52596f016d7ca9b8127f7033d'
+Remove-PortPatches detours
+
 New-PortOverlay libyaml -Version 0.2.5 -PortVersion 5
 Update-PortSource libyaml -Commit '840b65c40675e2d06bf40405ad3f12dec7f35923' -SourceHash 'de85560312d53a007a2ddf1fe403676bbd34620480b1ba446b8c16bb366524ba7a6ed08f6316dd783bf980d9e26603a9efc82f134eb0235917b3be1d3eb4b302'
 Update-PortVersion libyaml
diff --git a/src/VcpkgPortOverlay/README.md b/src/VcpkgPortOverlay/README.md
index e8063e8081..9b38261af4 100644
--- a/src/VcpkgPortOverlay/README.md
+++ b/src/VcpkgPortOverlay/README.md
@@ -12,7 +12,18 @@ Note that we use v2.10.18, which is not the latest.
 
 Changes:
 * Add patch file: `add-server-certificate-validation.patch`
-  Patch source: https://github.com/microsoft/winget-cli/commit/888b4ed8f4f7d25cb05a47210e083fe29348163b
+* Patch source: https://github.com/microsoft/winget-cli/commit/888b4ed8f4f7d25cb05a47210e083fe29348163b
+
+## detours
+
+We use the version used by UndockedRegFreeWinRT (https://github.com/microsoft/winget-cli/tree/release-v1.10/src/Xlang/UndockedRegFreeWinRT/src/UndockedRegFreeWinRT/detours).
+The only official release of detours (4.0.1) does not include complete support for ARM64.
+While the exact version that we pulled from UndockedRegFreeWinRT is unclear (https://github.com/microsoft/xlang/pull/644), through manually comparing versions it is equivalent to
+https://github.com/microsoft/Detours/commit/404c153ff390cb14f1787c7feeb4908c6d79b0ab (only some whitespace changes are present).
+
+Changes:
+* New source commit: https://github.com/microsoft/Detours/commit/404c153ff390cb14f1787c7feeb4908c6d79b0ab
+* Remove the patch on the official port as it is already present in the newer commit
 
 ## libyaml
 
diff --git a/src/VcpkgPortOverlay/detours/find-jmp-bounds-arm64.patch b/src/VcpkgPortOverlay/detours/find-jmp-bounds-arm64.patch
new file mode 100644
index 0000000000..21390cec05
--- /dev/null
+++ b/src/VcpkgPortOverlay/detours/find-jmp-bounds-arm64.patch
@@ -0,0 +1,24 @@
+diff --git a/src/detours.cpp b/src/detours.cpp
+index 8345c4d..3cd0e9d 100644
+--- a/src/detours.cpp
++++ b/src/detours.cpp
+@@ -974,6 +974,19 @@ inline PBYTE detour_skip_jmp(PBYTE pbCode, PVOID *ppGlobals)
+     return pbCode;
+ }
+ 
++inline void detour_find_jmp_bounds(PBYTE pbCode,
++                                   PDETOUR_TRAMPOLINE *ppLower,
++                                   PDETOUR_TRAMPOLINE *ppUpper)
++{
++    // We have to place trampolines within +/- 2GB of code.
++    ULONG_PTR lo = detour_2gb_below((ULONG_PTR)pbCode);
++    ULONG_PTR hi = detour_2gb_above((ULONG_PTR)pbCode);
++    DETOUR_TRACE(("[%p..%p..%p]\n", lo, pbCode, hi));
++
++    *ppLower = (PDETOUR_TRAMPOLINE)lo;
++    *ppUpper = (PDETOUR_TRAMPOLINE)hi;
++}
++
+ inline BOOL detour_does_code_end_function(PBYTE pbCode)
+ {
+     ULONG Opcode = fetch_opcode(pbCode);
diff --git a/src/VcpkgPortOverlay/detours/portfile.cmake b/src/VcpkgPortOverlay/detours/portfile.cmake
new file mode 100644
index 0000000000..1a025f9a04
--- /dev/null
+++ b/src/VcpkgPortOverlay/detours/portfile.cmake
@@ -0,0 +1,34 @@
+vcpkg_check_linkage(ONLY_STATIC_LIBRARY)
+
+vcpkg_from_github(
+    OUT_SOURCE_PATH SOURCE_PATH
+    REPO microsoft/Detours
+    REF 404c153ff390cb14f1787c7feeb4908c6d79b0ab # Unreleased
+    SHA512 1f3f26657927fa153116dce13dbfa3319ea368e6c9017f4999b6ec24d6356c335b3d5326718d3ec707b92832763ffea092088df52596f016d7ca9b8127f7033d
+    HEAD_REF master
+)
+
+vcpkg_build_nmake(
+    SOURCE_PATH "${SOURCE_PATH}"
+    PROJECT_SUBPATH "src"
+    PROJECT_NAME "Makefile"
+    OPTIONS "PROCESSOR_ARCHITECTURE=${VCPKG_TARGET_ARCHITECTURE}"
+    OPTIONS_RELEASE "DETOURS_CONFIG=Release"
+    OPTIONS_DEBUG "DETOURS_CONFIG=Debug"
+)
+
+if(NOT DEFINED VCPKG_BUILD_TYPE OR VCPKG_BUILD_TYPE STREQUAL "release")
+    file(INSTALL "${CURRENT_BUILDTREES_DIR}/${TARGET_TRIPLET}-rel/lib.${VCPKG_TARGET_ARCHITECTURE}Release/" DESTINATION "${CURRENT_PACKAGES_DIR}/lib")
+endif()
+if(NOT DEFINED VCPKG_BUILD_TYPE OR VCPKG_BUILD_TYPE STREQUAL "debug")
+    file(INSTALL "${CURRENT_BUILDTREES_DIR}/${TARGET_TRIPLET}-dbg/lib.${VCPKG_TARGET_ARCHITECTURE}Debug/" DESTINATION "${CURRENT_PACKAGES_DIR}/debug/lib")
+endif()
+
+if(NOT DEFINED VCPKG_BUILD_TYPE OR VCPKG_BUILD_TYPE STREQUAL "release")
+    file(INSTALL "${CURRENT_BUILDTREES_DIR}/${TARGET_TRIPLET}-rel/include/" DESTINATION "${CURRENT_PACKAGES_DIR}/include" RENAME detours)
+else()
+    file(INSTALL "${CURRENT_BUILDTREES_DIR}/${TARGET_TRIPLET}-dbg/include/" DESTINATION "${CURRENT_PACKAGES_DIR}/include" RENAME detours)
+endif()
+
+file(INSTALL "${SOURCE_PATH}/LICENSE.md" DESTINATION "${CURRENT_PACKAGES_DIR}/share/${PORT}" RENAME copyright)
+file(INSTALL "${CMAKE_CURRENT_LIST_DIR}/usage" DESTINATION "${CURRENT_PACKAGES_DIR}/share/${PORT}")
diff --git a/src/VcpkgPortOverlay/detours/usage b/src/VcpkgPortOverlay/detours/usage
new file mode 100644
index 0000000000..00f978fb68
--- /dev/null
+++ b/src/VcpkgPortOverlay/detours/usage
@@ -0,0 +1,7 @@
+detours can be used from CMake via:
+
+    find_path(DETOURS_INCLUDE_DIRS "detours/detours.h")
+    find_library(DETOURS_LIBRARY detours REQUIRED)
+
+    target_include_directories(main PRIVATE ${DETOURS_INCLUDE_DIRS})
+    target_link_libraries(main PRIVATE ${DETOURS_LIBRARY})
diff --git a/src/VcpkgPortOverlay/detours/vcpkg.json b/src/VcpkgPortOverlay/detours/vcpkg.json
new file mode 100644
index 0000000000..b0f745daf6
--- /dev/null
+++ b/src/VcpkgPortOverlay/detours/vcpkg.json
@@ -0,0 +1,9 @@
+{
+  "name": "detours",
+  "version": "4.0.1",
+  "port-version": 8,
+  "description": "Detours is a software package for monitoring and instrumenting API calls on Windows.",
+  "homepage": "https://github.com/microsoft/Detours",
+  "license": "MIT",
+  "supports": "windows & !uwp"
+}