diff --git a/BaseTools/Conf/tools_def.template b/BaseTools/Conf/tools_def.template
index 13cf0f91b625..76aaae726109 100755
--- a/BaseTools/Conf/tools_def.template
+++ b/BaseTools/Conf/tools_def.template
@@ -67,8 +67,8 @@ DEFINE WINSDK_BIN           = ENV(WINSDK_PREFIX)
 DEFINE WINSDKx86_BIN        = ENV(WINSDKx86_PREFIX)
 
 # Microsoft Visual Studio 2015 Professional Edition
-DEFINE WINSDK81_BIN         = ENV(WINSDK81_PREFIX)x86\
-DEFINE WINSDK81x86_BIN      = ENV(WINSDK81x86_PREFIX)x64
+DEFINE WINSDK81_BIN         = ENV(WINSDK81_PREFIX)x64
+DEFINE WINSDK81x86_BIN      = ENV(WINSDK81x86_PREFIX)x86
 
 # Microsoft Visual Studio 2017/2019/2022 Professional Edition
 DEFINE WINSDK10_BIN         = ENV(WINSDK10_PREFIX)DEF(VS_HOST)
diff --git a/BaseTools/set_vsprefix_envs.bat b/BaseTools/set_vsprefix_envs.bat
index 39e4e004b500..df2c771951c3 100644
--- a/BaseTools/set_vsprefix_envs.bat
+++ b/BaseTools/set_vsprefix_envs.bat
@@ -35,10 +35,18 @@ if defined VS140COMNTOOLS (
     set "VS2015_PREFIX=%VS140COMNTOOLS:~0,-14%"
   )
   if not defined WINSDK81_PREFIX (
-    set "WINSDK81_PREFIX=c:\Program Files\Windows Kits\8.1\bin\"
+    if exist "%ProgramFiles%\Windows Kits\8.1\bin" (
+      set "WINSDK81_PREFIX=%ProgramFiles%\Windows Kits\8.1\bin\"
+    ) else if exist "%ProgramFiles(x86)%\Windows Kits\8.1\bin" (
+      set "WINSDK81_PREFIX=%ProgramFiles(x86)%\Windows Kits\8.1\bin\"
+    )
   )
   if not defined WINSDK81x86_PREFIX (
-    set "WINSDK81x86_PREFIX=c:\Program Files (x86)\Windows Kits\8.1\bin\"
+    if exist "%ProgramFiles(x86)%\Windows Kits\8.1\bin" (
+      set "WINSDK81x86_PREFIX=%ProgramFiles(x86)%\Windows Kits\8.1\bin\"
+    ) else if exist "%ProgramFiles%\Windows Kits\8.1\bin" (
+      set "WINSDK81x86_PREFIX=%ProgramFiles%\Windows Kits\8.1\bin\"
+    )
   )
 ) else (
   if /I "%1"=="VS2015" goto ToolNotInstall