diff --git a/.evergreen/abi-stability-setup.sh b/.evergreen/abi-stability-setup.sh
index 54d4518d23..1086f683e6 100755
--- a/.evergreen/abi-stability-setup.sh
+++ b/.evergreen/abi-stability-setup.sh
@@ -26,6 +26,13 @@ declare cmake_binary
 cmake_binary="$(find_cmake_latest)"
 command -V "${cmake_binary:?}"
 
+# Use ccache if available.
+if [[ -f "./mongoc/.evergreen/scripts/find-ccache.sh" ]]; then
+  # shellcheck source=/dev/null
+  . "./mongoc/.evergreen/scripts/find-ccache.sh"
+  find_ccache_and_export_vars "$(pwd)" || true
+fi
+
 # To use a different base commit, replace `--abbrev 0` with the intended commit.
 # Note: EVG treat all changes relative to the EVG base commit as staged changes!
 declare base current
@@ -55,17 +62,6 @@ else
   CMAKE_BUILD_PARALLEL_LEVEL="${parallel_level:?}"
 fi
 
-# Use ccache if available.
-if command -V ccache 2>/dev/null; then
-  export CMAKE_C_COMPILER_LAUNCHER=ccache
-  export CMAKE_CXX_COMPILER_LAUNCHER=ccache
-
-  # Allow reuse of ccache compilation results between different build directories.
-  export CCACHE_BASEDIR CCACHE_NOHASHDIR
-  CCACHE_BASEDIR="$(pwd)/mongo-cxx-driver"
-  CCACHE_NOHASHDIR=1
-fi
-
 # Install prefix to use for ABI compatibility scripts.
 mkdir -p "${working_dir}/install"
 
diff --git a/.evergreen/compile.sh b/.evergreen/compile.sh
index ef1d3e685e..f02e65ef97 100755
--- a/.evergreen/compile.sh
+++ b/.evergreen/compile.sh
@@ -66,17 +66,10 @@ CMAKE_BUILD_PARALLEL_LEVEL="$(nproc)"
 export CMAKE_BUILD_PARALLEL_LEVEL
 
 # Use ccache if available.
-if command -V ccache 2>/dev/null; then
-  export CMAKE_CXX_COMPILER_LAUNCHER=ccache
-
-  # Allow reuse of ccache compilation results between different build directories.
-  export CCACHE_BASEDIR CCACHE_NOHASHDIR
-  if [[ "${OSTYPE:?}" == "cygwin" ]]; then
-    CCACHE_BASEDIR="$(cygpath -aw "$(pwd)")"
-  else
-    CCACHE_BASEDIR="$(pwd)"
-  fi
-  CCACHE_NOHASHDIR=1
+if [[ -f "${mongoc_prefix:?}/.evergreen/scripts/find-ccache.sh" ]]; then
+  # shellcheck source=/dev/null
+  . "${mongoc_prefix:?}/.evergreen/scripts/find-ccache.sh"
+  find_ccache_and_export_vars "$(pwd)" || true
 fi
 
 cmake_build_opts=()
diff --git a/.evergreen/install_c_driver.sh b/.evergreen/install_c_driver.sh
index 3f3eba3cf5..5afda21337 100755
--- a/.evergreen/install_c_driver.sh
+++ b/.evergreen/install_c_driver.sh
@@ -131,14 +131,10 @@ else
 fi
 
 # Use ccache if available.
-if command -V ccache 2>/dev/null; then
-  export CMAKE_C_COMPILER_LAUNCHER=ccache
-  export CMAKE_CXX_COMPILER_LAUNCHER=ccache
-
-  # Allow reuse of ccache compilation results between different build directories.
-  export CCACHE_BASEDIR CCACHE_NOHASHDIR
-  CCACHE_BASEDIR="${mongoc_idir}"
-  CCACHE_NOHASHDIR=1
+if [[ -f "${mongoc_dir:?}/.evergreen/scripts/find-ccache.sh" ]]; then
+  # shellcheck source=/dev/null
+  . "${mongoc_dir:?}/.evergreen/scripts/find-ccache.sh"
+  find_ccache_and_export_vars "$(pwd)" || true
 fi
 
 # Install libmongoc.
diff --git a/.evergreen/test.sh b/.evergreen/test.sh
index e5e40b524f..8b7ef77ffe 100755
--- a/.evergreen/test.sh
+++ b/.evergreen/test.sh
@@ -106,6 +106,9 @@ export MONGOCXX_TEST_TLS_CA_FILE="${DRIVERS_TOOLS:?}/.evergreen/x509gen/ca.pem"
 
 if [ "$(uname -m)" == "ppc64le" ]; then
   echo "Skipping CSFLE test setup (CDRIVER-4246/CXX-2423)"
+elif [[ "${distro_id:?}" =~ windows-64-vs2015-* ]]; then
+  # Python: ImportError: DLL load failed while importing _rust: The specified procedure could not be found.
+  echo "Skipping CSFLE test setup (CXX-2628)"
 else
   # export environment variables for encryption tests
   set +o errexit
@@ -202,7 +205,7 @@ else
     for _ in $(seq 60); do
       # Exit code 7: "Failed to connect to host".
       if
-        curl -s "localhost:${port:?}"
+        curl -s -m 1 "localhost:${port:?}"
         (($? != 7))
       then
         return 0
diff --git a/.mci.yml b/.mci.yml
index 49557bfbaf..370d049d8d 100644
--- a/.mci.yml
+++ b/.mci.yml
@@ -215,7 +215,7 @@ functions:
                 wait_for_mongohouse() {
                     for _ in $(seq 300); do
                         # Exit code 7: "Failed to connect to host".
-                        if curl -s localhost:$1; (("$?" != 7)); then
+                        if curl -s -m 1 localhost:$1; (("$?" != 7)); then
                             return 0
                         else
                             sleep 1
@@ -419,23 +419,17 @@ functions:
           script: |-
             set -o errexit
             echo "Preparing CSFLE venv environment..."
+            if [[ "${distro_id}" =~ windows-64-vs2015-* ]]; then
+              # Python: ImportError: DLL load failed while importing _rust: The specified procedure could not be found.
+              echo "Preparing CSFLE venv environment... skipped."
+              exit 0
+            fi
             cd ./drivers-evergreen-tools/.evergreen/csfle
             # This function ensures future invocations of activate-kmstlsvenv.sh conducted in
             # parallel do not race to setup a venv environment; it has already been prepared.
             # This primarily addresses the situation where the "test" and "run_kms_servers"
             # functions invoke 'activate-kmstlsvenv.sh' simultaneously.
-            if [[ "$OSTYPE" =~ cygwin && ! -d kmstlsvenv ]]; then
-                # Avoid using Python 3.10 on Windows due to incompatible cipher suites.
-                # See CXX-2628.
-                . ../venv-utils.sh
-                venvcreate "C:/python/Python39/python.exe" kmstlsvenv || # windows-2017
-                venvcreate "C:/python/Python38/python.exe" kmstlsvenv    # windows-2015
-                python -m pip install --upgrade boto3~=1.19 pykmip~=0.10.0 "sqlalchemy<2.0.0"
-                deactivate
-            else
-                . ./activate-kmstlsvenv.sh
-                deactivate
-            fi
+            . ./activate-kmstlsvenv.sh && deactivate
             echo "Preparing CSFLE venv environment... done."
       - command: shell.exec
         params:
@@ -444,6 +438,11 @@ functions:
           script: |-
             set -o errexit
             echo "Starting mock KMS servers..."
+            if [[ "${distro_id}" =~ windows-64-vs2015-* ]]; then
+              # Python: ImportError: DLL load failed while importing _rust: The specified procedure could not be found.
+              echo "Starting mock KMS servers... skipped."
+              exit 0
+            fi
             cd ./drivers-evergreen-tools/.evergreen/csfle
             . ./activate-kmstlsvenv.sh
             python -u kms_http_server.py --ca_file ../x509gen/ca.pem --cert_file ../x509gen/server.pem --port 8999 &
@@ -1044,19 +1043,8 @@ tasks:
             export cmake_binary
             cmake_binary="$(find_cmake_latest)"
             # Use ccache if available.
-            if command -V ccache 2>/dev/null; then
-              export CMAKE_C_COMPILER_LAUNCHER=ccache
-              export CMAKE_CXX_COMPILER_LAUNCHER=ccache
-
-              # Allow reuse of ccache compilation results between different build directories.
-              export CCACHE_BASEDIR CCACHE_NOHASHDIR
-              if [[ "${OSTYPE:?}" == "cygwin" ]]; then
-                CCACHE_BASEDIR="$(cygpath -aw "$(pwd)")"
-              else
-                CCACHE_BASEDIR="$(pwd)"
-              fi
-              CCACHE_NOHASHDIR=1
-            fi
+            . ./mongo-c-driver/.evergreen/scripts/find-ccache.sh
+            find_ccache_and_export_vars "$(pwd)" || true
             command -v "$cmake_binary"
             "$cmake_binary" -S . -B build -DENABLE_AUTOMATIC_INIT_AND_CLEANUP=OFF
             "$cmake_binary" --build build