diff -Naur orig/cmake/defaults/Packages.cmake external_usd/cmake/defaults/Packages.cmake
--- orig/cmake/defaults/Packages.cmake	2022-10-27 12:56:33 -0600
+++ external_usd/cmake/defaults/Packages.cmake	2022-10-27 13:05:08 -0600
@@ -129,7 +129,7 @@
 endif()
 
 # --TBB
-find_package(TBB REQUIRED COMPONENTS tbb)
+find_package(TBB)
 add_definitions(${TBB_DEFINITIONS})
 
 # --math
diff -Naur orig/cmake/defaults/msvcdefaults.cmake external_usd/cmake/defaults/msvcdefaults.cmake
--- orig/cmake/defaults/msvcdefaults.cmake	2022-10-27 12:56:33 -0600
+++ external_usd/cmake/defaults/msvcdefaults.cmake	2022-10-27 13:05:08 -0600
@@ -120,9 +120,6 @@
 # for all translation units.
 set(_PXR_CXX_FLAGS "${_PXR_CXX_FLAGS} /bigobj")
 
-# Enable PDB generation.
-set(_PXR_CXX_FLAGS "${_PXR_CXX_FLAGS} /Zi")
-
 # Enable multiprocessor builds.
 set(_PXR_CXX_FLAGS "${_PXR_CXX_FLAGS} /MP")
 set(_PXR_CXX_FLAGS "${_PXR_CXX_FLAGS} /Gm-")
diff -Naur orig/pxr/base/arch/timing.h external_usd/pxr/base/arch/timing.h
--- orig/pxr/base/arch/timing.h	2022-10-27 12:56:34 -0600
+++ external_usd/pxr/base/arch/timing.h	2022-10-27 13:05:08 -0600
@@ -84,6 +84,10 @@
 inline uint64_t
 ArchGetStartTickTime()
 {
+    // BLENDER: avoid using rdtsc instruction that is not supported on older CPUs.
+    return ArchGetTickTime();
+
+#if 0
     uint64_t t;
 #if defined (ARCH_OS_DARWIN)
     return ArchGetTickTime();
@@ -116,6 +120,7 @@
 #error "Unsupported architecture."
 #endif
   return t;
+#endif
 }
 
 /// Get a "stop" tick time for measuring an interval of time.  See
@@ -125,6 +130,10 @@
 inline uint64_t
 ArchGetStopTickTime()
 {
+    // BLENDER: avoid using rdtsc instruction that is not supported on older CPUs.
+    return ArchGetTickTime();
+
+#if 0
     uint64_t t;
 #if defined (ARCH_OS_DARWIN)
     return ArchGetTickTime();
@@ -155,11 +164,11 @@
 #error "Unsupported architecture."
 #endif
   return t;
+#endif
 }
 
-#if defined (doxygen) ||                                                       \
-    (!defined(ARCH_OS_DARWIN) && defined(ARCH_CPU_INTEL) &&                    \
-     (defined(ARCH_COMPILER_CLANG) || defined(ARCH_COMPILER_GCC)))
+// BLENDER: avoid using rdtsc instruction that is not supported on older CPUs.
+#if 0
 
 /// A simple timer class for measuring an interval of time using the
 /// ArchTickTimer facilities.
diff -Naur orig/pxr/imaging/hioOpenVDB/CMakeLists.txt external_usd/pxr/imaging/hioOpenVDB/CMakeLists.txt
--- orig/pxr/imaging/hioOpenVDB/CMakeLists.txt	2022-10-27 12:56:35 -0600
+++ external_usd/pxr/imaging/hioOpenVDB/CMakeLists.txt	2022-10-27 13:05:08 -0600
@@ -20,6 +20,12 @@
     LIST(APPEND __VDB_IMATH_LIBS ${OPENEXR_Half_LIBRARY})
 endif()
 
+if (WIN32)
+    # OpenVDB uses constants from <cmath> that aren't available on
+    # Windows unless this is defined.
+    add_definitions(-D_USE_MATH_DEFINES)
+endif()
+
 pxr_library(hioOpenVDB
     LIBRARIES
         ar
diff -Naur orig/pxr/usdImaging/CMakeLists.txt external_usd/pxr/usdImaging/CMakeLists.txt
--- orig/pxr/usdImaging/CMakeLists.txt	2022-10-27 12:56:37 -0600
+++ external_usd/pxr/usdImaging/CMakeLists.txt	2022-10-27 13:05:08 -0600
@@ -7,7 +7,7 @@
     usdVolImaging
     usdAppUtils
     usdviewq
-    bin
+#    bin
     plugin
 )