diff --git a/Doc/library/sys.rst b/Doc/library/sys.rst
index 721edd1495aa5b..759c714b6c97a6 100644
--- a/Doc/library/sys.rst
+++ b/Doc/library/sys.rst
@@ -796,11 +796,16 @@ always available.
    Microsoft documentation on :c:func:`OSVERSIONINFOEX` for more information
    about these fields.
 
-   *platform_version* returns the accurate major version, minor version and
+   *platform_version* returns the major version, minor version and
    build number of the current operating system, rather than the version that
    is being emulated for the process. It is intended for use in logging rather
    than for feature detection.
 
+   .. note::
+      *platform_version* derives the version from kernel32.dll which can be of a different
+      version than the OS version. Please use :mod:`platform` module for achieving accurate
+      OS version.
+
    .. availability:: Windows.
 
    .. versionchanged:: 3.2
diff --git a/Lib/platform.py b/Lib/platform.py
index d567dd1a6e1ad7..d298a42edc8483 100755
--- a/Lib/platform.py
+++ b/Lib/platform.py
@@ -239,11 +239,9 @@ def _norm_version(version, build=''):
     if build:
         l.append(build)
     try:
-        ints = map(int, l)
+        strings = list(map(str, map(int, l)))
     except ValueError:
         strings = l
-    else:
-        strings = list(map(str, ints))
     version = '.'.join(strings[:3])
     return version
 
@@ -365,17 +363,20 @@ def win32_ver(release='', version='', csd='', ptype=''):
         return release, version, csd, ptype
 
     winver = getwindowsversion()
-    maj, min, build = winver.platform_version or winver[:3]
-    version = '{0}.{1}.{2}'.format(maj, min, build)
+    try:
+        major, minor, build = map(int, _syscmd_ver()[2].split('.'))
+    except ValueError:
+        major, minor, build = winver.platform_version or winver[:3]
+    version = '{0}.{1}.{2}'.format(major, minor, build)
 
-    release = (_WIN32_CLIENT_RELEASES.get((maj, min)) or
-               _WIN32_CLIENT_RELEASES.get((maj, None)) or
+    release = (_WIN32_CLIENT_RELEASES.get((major, minor)) or
+               _WIN32_CLIENT_RELEASES.get((major, None)) or
                release)
 
     # getwindowsversion() reflect the compatibility mode Python is
     # running under, and so the service pack value is only going to be
     # valid if the versions match.
-    if winver[:2] == (maj, min):
+    if winver[:2] == (major, minor):
         try:
             csd = 'SP{}'.format(winver.service_pack_major)
         except AttributeError:
@@ -384,8 +385,8 @@ def win32_ver(release='', version='', csd='', ptype=''):
 
     # VER_NT_SERVER = 3
     if getattr(winver, 'product_type', None) == 3:
-        release = (_WIN32_SERVER_RELEASES.get((maj, min)) or
-                   _WIN32_SERVER_RELEASES.get((maj, None)) or
+        release = (_WIN32_SERVER_RELEASES.get((major, minor)) or
+                   _WIN32_SERVER_RELEASES.get((major, None)) or
                    release)
 
     try:
diff --git a/Misc/NEWS.d/next/Library/2021-04-21-14-50-57.bpo-43284.2QZn2T.rst b/Misc/NEWS.d/next/Library/2021-04-21-14-50-57.bpo-43284.2QZn2T.rst
new file mode 100644
index 00000000000000..7e41016015efed
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2021-04-21-14-50-57.bpo-43284.2QZn2T.rst
@@ -0,0 +1,6 @@
+platform.win32_ver derives the windows version from
+sys.getwindowsversion().platform_version which in turn derives the version
+from kernel32.dll (which can be of a different version than Windows itself).
+Therefore change the platform.win32_ver to determine the version using the
+platform module's _syscmd_ver private function to return an accurate
+version.