diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d5b5f581d..7c1ead786 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -37,33 +37,10 @@ jobs:
           fetch-depth: 0
 
       - name: Set up Python ${{ matrix.python-version }}
-        if: ${{ matrix.os != 'windows-latest' }}
         uses: actions/setup-python@v2
         with:
           python-version: ${{ matrix.python-version }}
 
-      # See note below about need for using 32-bit Python 2.7 on
-      # Windows.
-      - name: Set up Python ${{ matrix.python-version }} [Windows x64]
-        if: ${{ ( matrix.os == 'windows-latest' ) && ( matrix.python-version != '2.7' ) }}
-        uses: actions/setup-python@v2
-        with:
-          python-version: ${{ matrix.python-version }}
-          architecture: 'x64'
-
-      # We use netifaces, which does not ship a 64-bit wheel for the
-      # Python 2.7 + Windows combination, but it ships a 32-bit wheel.
-      # Since MS has removed vcpython27 compiler downloads from their
-      # usual download site, building a netifaces wheel locally is not
-      # an option anymore.  So let us just test with 32-bit Python on
-      # Windows.
-      - name: Set up Python ${{ matrix.python-version }} [Windows x86]
-        if: ${{ ( matrix.os == 'windows-latest' ) && ( matrix.python-version == '2.7' ) }}
-        uses: actions/setup-python@v1
-        with:
-          python-version: ${{ matrix.python-version }}
-          architecture: 'x86'
-
       # To use pip caching with GitHub Actions in an OS-independent
       # manner, we need `pip cache dir` command, which became
       # available since pip v20.1+.  At the time of writing this,
@@ -189,9 +166,20 @@ jobs:
         if: matrix.os == 'ubuntu-latest'
         run: sudo apt install tor
 
-      - name: Install Tor [macOS]
-        if: matrix.os == 'macos-latest'
+      - name: Install Tor [macOS, ${{ matrix.python-version }} ]
+        if: ${{ ( matrix.os == 'macos-latest' ) &&  ( matrix.python-version != '2.7' ) }}
         run: brew install tor
+        
+      # TODO: See https://tahoe-lafs.org/trac/tahoe-lafs/ticket/3744.
+      # We have to use an older version of Tor for running integration
+      # tests on macOS using Python 2.7.  We should stop doing this
+      # when Python 2.7 is dropped.
+      - name: Install Tor [macOS, ${{ matrix.python-version }} ]
+        if: ${{ ( matrix.os == 'macos-latest' ) &&  ( matrix.python-version == '2.7' ) }}
+        run: |
+          brew extract --version 0.4.5.8 tor homebrew/cask
+          brew install tor@0.4.5.8
+          brew link --overwrite tor@0.4.5.8
 
       - name: Install Tor [Windows]
         if: matrix.os == 'windows-latest'
@@ -205,19 +193,10 @@ jobs:
           fetch-depth: 0
 
       - name: Set up Python ${{ matrix.python-version }}
-        if: ${{ matrix.os != 'windows-latest' }}
         uses: actions/setup-python@v1
         with:
           python-version: ${{ matrix.python-version }}
 
-      # See this step under coverage job.
-      - name: Set up Python ${{ matrix.python-version }} [Windows x86]
-        if: ${{ matrix.os == 'windows-latest' }}
-        uses: actions/setup-python@v1
-        with:
-          python-version: ${{ matrix.python-version }}
-          architecture: 'x86'
-
       - name: Get pip cache directory
         id: pip-cache
         run: |
@@ -274,19 +253,10 @@ jobs:
           fetch-depth: 0
 
       - name: Set up Python ${{ matrix.python-version }}
-        if: ${{ matrix.os != 'windows-latest' }}
         uses: actions/setup-python@v1
         with:
           python-version: ${{ matrix.python-version }}
 
-      # See this step under coverage job.
-      - name: Set up Python ${{ matrix.python-version }} [Windows x86]
-        if: ${{ matrix.os == 'windows-latest' }}
-        uses: actions/setup-python@v1
-        with:
-          python-version: ${{ matrix.python-version }}
-          architecture: 'x86'
-
       - name: Get pip cache directory
         id: pip-cache
         run: |
diff --git a/newsfragments/3681.installation b/newsfragments/3681.installation
deleted file mode 100644
index a697e6c60..000000000
--- a/newsfragments/3681.installation
+++ /dev/null
@@ -1,3 +0,0 @@
-Tahoe-LAFS CI now runs tests only on 32-bit Windows. Microsoft has
-removed vcpython27 compiler downloads from their site, and Tahoe-LAFS
-needs vcpython27 to build and install netifaces on 64-bit Windows.
diff --git a/newsfragments/3681.minor b/newsfragments/3681.minor
new file mode 100644
index 000000000..bc84b6b8f
--- /dev/null
+++ b/newsfragments/3681.minor
@@ -0,0 +1,8 @@
+(The below text is no longer valid: netifaces has released a 64-bit
+Python 2.7 wheel for Windows.  Ticket #3733 made the switch in CI.  We
+should be able to test and run Tahoe-LAFS without needing vcpython27
+now.)
+
+Tahoe-LAFS CI now runs tests only on 32-bit Windows. Microsoft has
+removed vcpython27 compiler downloads from their site, and Tahoe-LAFS
+needs vcpython27 to build and install netifaces on 64-bit Windows.
diff --git a/newsfragments/3733.installation b/newsfragments/3733.installation
new file mode 100644
index 000000000..c1cac649b
--- /dev/null
+++ b/newsfragments/3733.installation
@@ -0,0 +1 @@
+Use netifaces 0.11.0 wheel package from PyPI.org if you use 64-bit Python 2.7 on Windows.  VCPython27 downloads are no longer available at Microsoft's website, which has made building Python 2.7 wheel packages of Python libraries with C extensions (such as netifaces) on Windows difficult.
diff --git a/newsfragments/3744.minor b/newsfragments/3744.minor
new file mode 100644
index 000000000..e69de29bb