--- a
+++ b/ci/appveyor-bootstrap.py
@@ -0,0 +1,116 @@
+"""
+AppVeyor will at least have few Pythons around so there's no point of implementing a bootstrapper in PowerShell.
+
+This is a port of https://github.com/pypa/python-packaging-user-guide/blob/master/source/code/install.ps1
+with various fixes and improvements that just weren't feasible to implement in PowerShell.
+"""
+from __future__ import print_function
+from os import environ
+from os.path import exists
+from subprocess import check_call
+
+try:
+    from urllib.request import urlretrieve
+except ImportError:
+    from urllib import urlretrieve
+
+BASE_URL = "https://www.python.org/ftp/python/"
+GET_PIP_URL = "https://bootstrap.pypa.io/get-pip.py"
+GET_PIP_PATH = "C:\get-pip.py"
+URLS = {
+    ("2.7", "64"): BASE_URL + "2.7.13/python-2.7.13.amd64.msi",
+    ("2.7", "32"): BASE_URL + "2.7.13/python-2.7.13.msi",
+    # NOTE: no .msi installer for 3.3.6
+    ("3.3", "64"): BASE_URL + "3.3.5/python-3.3.5.amd64.msi",
+    ("3.3", "32"): BASE_URL + "3.3.5/python-3.3.5.msi",
+    ("3.4", "64"): BASE_URL + "3.4.4/python-3.4.4.amd64.msi",
+    ("3.4", "32"): BASE_URL + "3.4.4/python-3.4.4.msi",
+    ("3.5", "64"): BASE_URL + "3.5.4/python-3.5.4-amd64.exe",
+    ("3.5", "32"): BASE_URL + "3.5.4/python-3.5.4.exe",
+    ("3.6", "64"): BASE_URL + "3.6.2/python-3.6.2-amd64.exe",
+    ("3.6", "32"): BASE_URL + "3.6.2/python-3.6.2.exe",
+}
+INSTALL_CMD = {
+    # Commands are allowed to fail only if they are not the last command.  Eg: uninstall (/x) allowed to fail.
+    "2.7": [["msiexec.exe", "/L*+!", "install.log", "/qn", "/x", "{path}"],
+            ["msiexec.exe", "/L*+!", "install.log", "/qn", "/i", "{path}", "TARGETDIR={home}"]],
+    "3.3": [["msiexec.exe", "/L*+!", "install.log", "/qn", "/x", "{path}"],
+            ["msiexec.exe", "/L*+!", "install.log", "/qn", "/i", "{path}", "TARGETDIR={home}"]],
+    "3.4": [["msiexec.exe", "/L*+!", "install.log", "/qn", "/x", "{path}"],
+            ["msiexec.exe", "/L*+!", "install.log", "/qn", "/i", "{path}", "TARGETDIR={home}"]],
+    "3.5": [["{path}", "/quiet", "TargetDir={home}"]],
+    "3.6": [["{path}", "/quiet", "TargetDir={home}"]],
+}
+
+
+def download_file(url, path):
+    print("Downloading: {} (into {})".format(url, path))
+    progress = [0, 0]
+
+    def report(count, size, total):
+        progress[0] = count * size
+        if progress[0] - progress[1] > 1000000:
+            progress[1] = progress[0]
+            print("Downloaded {:,}/{:,} ...".format(progress[1], total))
+
+    dest, _ = urlretrieve(url, path, reporthook=report)
+    return dest
+
+
+def install_python(version, arch, home):
+    print("Installing Python", version, "for", arch, "bit architecture to", home)
+    if exists(home):
+        return
+
+    path = download_python(version, arch)
+    print("Installing", path, "to", home)
+    success = False
+    for cmd in INSTALL_CMD[version]:
+        cmd = [part.format(home=home, path=path) for part in cmd]
+        print("Running:", " ".join(cmd))
+        try:
+            check_call(cmd)
+        except Exception as exc:
+            print("Failed command", cmd, "with:", exc)
+            if exists("install.log"):
+                with open("install.log") as fh:
+                    print(fh.read())
+        else:
+            success = True
+    if success:
+        print("Installation complete!")
+    else:
+        print("Installation failed")
+
+
+def download_python(version, arch):
+    for _ in range(3):
+        try:
+            return download_file(URLS[version, arch], "installer.exe")
+        except Exception as exc:
+            print("Failed to download:", exc)
+        print("Retrying ...")
+
+
+def install_pip(home):
+    pip_path = home + "/Scripts/pip.exe"
+    python_path = home + "/python.exe"
+    if exists(pip_path):
+        print("pip already installed.")
+    else:
+        print("Installing pip...")
+        download_file(GET_PIP_URL, GET_PIP_PATH)
+        print("Executing:", python_path, GET_PIP_PATH)
+        check_call([python_path, GET_PIP_PATH])
+
+
+def install_packages(home, *packages):
+    cmd = [home + "/Scripts/pip.exe", "install"]
+    cmd.extend(packages)
+    check_call(cmd)
+
+
+if __name__ == "__main__":
+    install_python(environ['PYTHON_VERSION'], environ['PYTHON_ARCH'], environ['PYTHON_HOME'])
+    install_pip(environ['PYTHON_HOME'])
+    install_packages(environ['PYTHON_HOME'], "setuptools>=18.0.1", "wheel", "tox", "virtualenv>=13.1.0")