diff --git a/libcxx/test/std/input.output/filesystems/class.directory_entry/directory_entry.mods/refresh.pass.cpp b/libcxx/test/std/input.output/filesystems/class.directory_entry/directory_entry.mods/refresh.pass.cpp
--- a/libcxx/test/std/input.output/filesystems/class.directory_entry/directory_entry.mods/refresh.pass.cpp
+++ b/libcxx/test/std/input.output/filesystems/class.directory_entry/directory_entry.mods/refresh.pass.cpp
@@ -8,8 +8,6 @@
 
 // UNSUPPORTED: c++03
 
-// XFAIL: LIBCXX-WINDOWS-FIXME
-
 // The string reported on errors changed, which makes those tests fail when run
 // against already-released libc++'s.
 // XFAIL: with_system_cxx_lib=macosx10.15
@@ -66,6 +64,9 @@
   }
 }
 
+#ifndef _WIN32
+// Windows doesn't support setting perms::none to trigger failures
+// reading directories.
 TEST_CASE(refresh_on_file_dne) {
   using namespace fs;
   scoped_test_env env;
@@ -100,6 +101,7 @@
     TEST_CHECK(!ent.exists());
   }
 }
+#endif
 
 void remove_if_exists(const fs::path& p) {
   std::error_code ec;
@@ -128,8 +130,10 @@
 
     LIBCPP_ONLY(permissions(dir, perms::none));
     TEST_CHECK(ent.is_symlink());
+#ifndef _WIN32
     TEST_CHECK(!ent.is_regular_file());
     TEST_CHECK(!ent.exists());
+#endif
   }
   permissions(dir, old_perms);
   env.create_file("dir/file", 101);
@@ -147,10 +151,15 @@
     TEST_CHECK(!ec); // we don't report bad symlinks as an error.
 
     LIBCPP_ONLY(permissions(dir, perms::none));
+#ifndef _WIN32
     TEST_CHECK(!ent.exists());
+#endif
   }
 }
 
+#ifndef _WIN32
+// Windows doesn't support setting perms::none to trigger failures
+// reading directories.
 TEST_CASE(refresh_cannot_resolve) {
   using namespace fs;
   scoped_test_env env;
@@ -224,6 +233,7 @@
     TEST_CHECK_NO_THROW(ent_sym2);
   }
 }
+#endif
 
 TEST_CASE(refresh_doesnt_throw_on_dne_but_reports_it) {
   using namespace fs;
@@ -271,6 +281,9 @@
   }
 }
 
+#ifndef _WIN32
+// Windows doesn't support setting perms::none to trigger failures
+// reading directories.
 TEST_CASE(access_cache_after_refresh_fails) {
   using namespace fs;
   scoped_test_env env;
@@ -342,5 +355,6 @@
   }
 #undef CHECK_ACCESS
 }
+#endif
 
 TEST_SUITE_END()
diff --git a/libcxx/test/std/input.output/filesystems/class.directory_entry/directory_entry.mods/replace_filename.pass.cpp b/libcxx/test/std/input.output/filesystems/class.directory_entry/directory_entry.mods/replace_filename.pass.cpp
--- a/libcxx/test/std/input.output/filesystems/class.directory_entry/directory_entry.mods/replace_filename.pass.cpp
+++ b/libcxx/test/std/input.output/filesystems/class.directory_entry/directory_entry.mods/replace_filename.pass.cpp
@@ -8,8 +8,6 @@
 
 // UNSUPPORTED: c++03
 
-// XFAIL: LIBCXX-WINDOWS-FIXME
-
 // <filesystem>
 
 // class directory_entry
@@ -125,6 +123,9 @@
   }
 }
 
+#ifndef _WIN32
+// Windows doesn't support setting perms::none to trigger failures
+// reading directories.
 TEST_CASE(test_replace_filename_propagates_error) {
   using namespace fs;
   scoped_test_env env;
@@ -167,5 +168,6 @@
     TEST_CHECK(ErrorIs(ec, std::errc::permission_denied));
   }
 }
+#endif
 
 TEST_SUITE_END()
diff --git a/libcxx/test/std/input.output/filesystems/class.directory_entry/directory_entry.obs/file_size.pass.cpp b/libcxx/test/std/input.output/filesystems/class.directory_entry/directory_entry.obs/file_size.pass.cpp
--- a/libcxx/test/std/input.output/filesystems/class.directory_entry/directory_entry.obs/file_size.pass.cpp
+++ b/libcxx/test/std/input.output/filesystems/class.directory_entry/directory_entry.obs/file_size.pass.cpp
@@ -8,8 +8,6 @@
 
 // UNSUPPORTED: c++03
 
-// XFAIL: LIBCXX-WINDOWS-FIXME
-
 // The string reported on errors changed, which makes those tests fail when run
 // against already-released libc++'s.
 // XFAIL: with_system_cxx_lib=macosx10.15
@@ -126,7 +124,9 @@
   const path sym_out_of_dir = env.create_symlink("dir/file", "sym");
   const path sym_in_dir = env.create_symlink("file2", "dir/sym2");
 
+#ifndef _WIN32
   const perms old_perms = status(dir).permissions();
+#endif
 
   // test a file which doesn't exist
   {
@@ -169,6 +169,9 @@
                              "directory_entry::file_size");
     TEST_CHECK_THROW_RESULT(filesystem_error, Checker, ent.file_size());
   }
+  // Windows doesn't support setting perms::none to trigger failures
+  // reading directories.
+#ifndef _WIN32
   // test a file w/o appropriate permissions.
   {
     directory_entry ent;
@@ -245,6 +248,7 @@
     TEST_CHECK(!ec);
     TEST_CHECK_NO_THROW(ent.file_size());
   }
+#endif
 }
 
 TEST_SUITE_END()
diff --git a/libcxx/test/std/input.output/filesystems/class.directory_entry/directory_entry.obs/file_type_obs.pass.cpp b/libcxx/test/std/input.output/filesystems/class.directory_entry/directory_entry.obs/file_type_obs.pass.cpp
--- a/libcxx/test/std/input.output/filesystems/class.directory_entry/directory_entry.obs/file_type_obs.pass.cpp
+++ b/libcxx/test/std/input.output/filesystems/class.directory_entry/directory_entry.obs/file_type_obs.pass.cpp
@@ -8,8 +8,6 @@
 
 // UNSUPPORTED: c++03
 
-// XFAIL: LIBCXX-WINDOWS-FIXME
-
 // <filesystem>
 
 // class directory_entry
@@ -207,6 +205,9 @@
   }
 }
 
+#ifndef _WIN32
+// Windows doesn't support setting perms::none to trigger failures
+// reading directories.
 TEST_CASE(test_with_ec_cannot_resolve) {
   using namespace fs;
   using fs::directory_entry;
@@ -269,5 +270,6 @@
     TEST_CHECK(CheckEC(sym_status_ec));
   }
 }
+#endif
 
 TEST_SUITE_END()
diff --git a/libcxx/test/std/input.output/filesystems/class.directory_entry/directory_entry.obs/hard_link_count.pass.cpp b/libcxx/test/std/input.output/filesystems/class.directory_entry/directory_entry.obs/hard_link_count.pass.cpp
--- a/libcxx/test/std/input.output/filesystems/class.directory_entry/directory_entry.obs/hard_link_count.pass.cpp
+++ b/libcxx/test/std/input.output/filesystems/class.directory_entry/directory_entry.obs/hard_link_count.pass.cpp
@@ -8,8 +8,6 @@
 
 // UNSUPPORTED: c++03
 
-// XFAIL: LIBCXX-WINDOWS-FIXME
-
 // The string reported on errors changed, which makes those tests fail when run
 // against already-released libc++'s.
 // XFAIL: with_system_cxx_lib=macosx10.15
@@ -129,7 +127,9 @@
   const path sym_out_of_dir = env.create_symlink("dir/file", "sym");
   const path sym_in_dir = env.create_symlink("file2", "dir/sym2");
 
+#ifndef _WIN32
   const perms old_perms = status(dir).permissions();
+#endif
 
   // test a file which doesn't exist
   {
@@ -173,6 +173,9 @@
                              "directory_entry::hard_link_count");
     TEST_CHECK_THROW_RESULT(filesystem_error, Checker, ent.hard_link_count());
   }
+  // Windows doesn't support setting perms::none to trigger failures
+  // reading directories.
+#ifndef _WIN32
   // test a file w/o appropriate permissions.
   {
     directory_entry ent;
@@ -250,6 +253,7 @@
     TEST_CHECK(!ec);
     TEST_CHECK_NO_THROW(ent.hard_link_count());
   }
+#endif
 }
 
 TEST_SUITE_END()
diff --git a/libcxx/test/std/input.output/filesystems/class.directory_entry/directory_entry.obs/last_write_time.pass.cpp b/libcxx/test/std/input.output/filesystems/class.directory_entry/directory_entry.obs/last_write_time.pass.cpp
--- a/libcxx/test/std/input.output/filesystems/class.directory_entry/directory_entry.obs/last_write_time.pass.cpp
+++ b/libcxx/test/std/input.output/filesystems/class.directory_entry/directory_entry.obs/last_write_time.pass.cpp
@@ -8,8 +8,6 @@
 
 // UNSUPPORTED: c++03
 
-// XFAIL: LIBCXX-WINDOWS-FIXME
-
 // The string reported on errors changed, which makes those tests fail when run
 // against already-released libc++'s.
 // XFAIL: with_system_cxx_lib=macosx10.15
@@ -98,7 +96,9 @@
   const path sym_out_of_dir = env.create_symlink("dir/file", "sym");
   const path sym_in_dir = env.create_symlink("file2", "dir/sym2");
 
+#ifndef _WIN32
   const perms old_perms = status(dir).permissions();
+#endif
 
   // test a file which doesn't exist
   {
@@ -141,6 +141,9 @@
                              "directory_entry::last_write_time");
     TEST_CHECK_THROW_RESULT(filesystem_error, Checker, ent.last_write_time());
   }
+  // Windows doesn't support setting perms::none to trigger failures
+  // reading directories.
+#ifndef _WIN32
   // test a file w/o appropriate permissions.
   {
     directory_entry ent;
@@ -218,6 +221,7 @@
     TEST_CHECK(!ec);
     TEST_CHECK_NO_THROW(ent.last_write_time());
   }
+#endif
 }
 
 TEST_SUITE_END()
diff --git a/libcxx/test/std/input.output/filesystems/class.rec.dir.itr/rec.dir.itr.members/increment.pass.cpp b/libcxx/test/std/input.output/filesystems/class.rec.dir.itr/rec.dir.itr.members/increment.pass.cpp
--- a/libcxx/test/std/input.output/filesystems/class.rec.dir.itr/rec.dir.itr.members/increment.pass.cpp
+++ b/libcxx/test/std/input.output/filesystems/class.rec.dir.itr/rec.dir.itr.members/increment.pass.cpp
@@ -8,8 +8,6 @@
 
 // UNSUPPORTED: c++03
 
-// XFAIL: LIBCXX-WINDOWS-FIXME
-
 // <filesystem>
 
 // class recursive_directory_iterator
@@ -142,6 +140,9 @@
     TEST_CHECK(it == endIt);
 }
 
+// Windows doesn't support setting perms::none to trigger failures
+// reading directories.
+#ifndef _WIN32
 TEST_CASE(access_denied_on_recursion_test_case)
 {
     using namespace fs;
@@ -492,6 +493,7 @@
       }
     }
 }
+#endif
 
 
 TEST_SUITE_END()
diff --git a/libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.create_directory/create_directory_with_attributes.pass.cpp b/libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.create_directory/create_directory_with_attributes.pass.cpp
--- a/libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.create_directory/create_directory_with_attributes.pass.cpp
+++ b/libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.create_directory/create_directory_with_attributes.pass.cpp
@@ -8,8 +8,6 @@
 
 // UNSUPPORTED: c++03
 
-// XFAIL: LIBCXX-WINDOWS-FIXME
-
 // This test requires the dylib support introduced in D92769.
 // XFAIL: with_system_cxx_lib=macosx10.15
 
@@ -60,6 +58,8 @@
     TEST_CHECK(fs::create_directory(dir, dir2) == false);
 }
 
+// Windows doesn't have the concept of perms::none on directories.
+#ifndef _WIN32
 TEST_CASE(create_directory_one_level)
 {
     scoped_test_env env;
@@ -79,6 +79,7 @@
     auto st = status(dir);
     TEST_CHECK(st.permissions() == perms::none);
 }
+#endif
 
 TEST_CASE(create_directory_multi_level)
 {
diff --git a/libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.last_write_time/last_write_time.pass.cpp b/libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.last_write_time/last_write_time.pass.cpp
--- a/libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.last_write_time/last_write_time.pass.cpp
+++ b/libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.last_write_time/last_write_time.pass.cpp
@@ -573,6 +573,9 @@
     TEST_CHECK(ErrorIs(ec, std::errc::no_such_file_or_directory));
 }
 
+// Windows doesn't support setting perms::none to trigger failures
+// reading directories.
+#ifndef _WIN32
 TEST_CASE(test_exists_fails)
 {
     scoped_test_env env;
@@ -588,5 +591,6 @@
                              "last_write_time");
     TEST_CHECK_THROW_RESULT(filesystem_error, Checker, last_write_time(file));
 }
+#endif
 
 TEST_SUITE_END()
diff --git a/libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.remove/remove.pass.cpp b/libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.remove/remove.pass.cpp
--- a/libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.remove/remove.pass.cpp
+++ b/libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.remove/remove.pass.cpp
@@ -8,8 +8,6 @@
 
 // UNSUPPORTED: c++03
 
-// XFAIL: LIBCXX-WINDOWS-FIXME
-
 // <filesystem>
 
 // bool remove(const path& p);
@@ -62,7 +60,13 @@
     permissions(bad_perms_dir, perms::none);
     const path testCases[] = {
         non_empty_dir,
+#ifndef _WIN32
+        // Windows doesn't support setting perms::none on a directory to
+        // stop it from being accessed. And a fictional file under
+        // GetWindowsInaccessibleDir() doesn't cause fs::remove() to report
+        // errors, it just returns false cleanly.
         file_in_bad_dir,
+#endif
     };
     for (auto& p : testCases) {
         std::error_code ec;
diff --git a/libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.remove_all/remove_all.pass.cpp b/libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.remove_all/remove_all.pass.cpp
--- a/libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.remove_all/remove_all.pass.cpp
+++ b/libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.remove_all/remove_all.pass.cpp
@@ -8,8 +8,6 @@
 
 // UNSUPPORTED: c++03
 
-// XFAIL: LIBCXX-WINDOWS-FIXME
-
 // <filesystem>
 
 // uintmax_t remove_all(const path& p);
@@ -38,6 +36,10 @@
 
 TEST_CASE(test_error_reporting)
 {
+    scoped_test_env env;
+    // Windows doesn't support setting perms::none to trigger failures
+    // reading directories.
+#ifndef _WIN32
     auto checkThrow = [](path const& f, const std::error_code& ec)
     {
 #ifndef TEST_HAS_NO_EXCEPTIONS
@@ -54,7 +56,6 @@
         return true;
 #endif
     };
-    scoped_test_env env;
     const path non_empty_dir = env.create_dir("dir");
     env.create_file(non_empty_dir / "file1", 42);
     const path bad_perms_dir = env.create_dir("bad_dir");
@@ -74,6 +75,7 @@
         TEST_CHECK(ec);
         TEST_CHECK(checkThrow(p, ec));
     }
+#endif
 
     // PR#35780
     const path testCasesNonexistant[] = {
diff --git a/libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.status/status.pass.cpp b/libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.status/status.pass.cpp
--- a/libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.status/status.pass.cpp
+++ b/libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.status/status.pass.cpp
@@ -8,8 +8,6 @@
 
 // UNSUPPORTED: c++03
 
-// XFAIL: LIBCXX-WINDOWS-FIXME
-
 // <filesystem>
 
 // file_status status(const path& p);
@@ -56,6 +54,12 @@
     }
 }
 
+// Windows doesn't support setting perms::none to trigger failures
+// reading directories. Imaginary files under GetWindowsInaccessibleDir()
+// produce no_such_file_or_directory, not the error codes this test checks
+// for. Finally, status() for a too long file name doesn't return errors
+// on windows.
+#ifndef _WIN32
 TEST_CASE(test_status_cannot_resolve)
 {
     scoped_test_env env;
@@ -98,6 +102,7 @@
 #endif
     }
 }
+#endif
 
 TEST_CASE(status_file_types_test)
 {
diff --git a/libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.symlink_status/symlink_status.pass.cpp b/libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.symlink_status/symlink_status.pass.cpp
--- a/libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.symlink_status/symlink_status.pass.cpp
+++ b/libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.symlink_status/symlink_status.pass.cpp
@@ -8,8 +8,6 @@
 
 // UNSUPPORTED: c++03
 
-// XFAIL: LIBCXX-WINDOWS-FIXME
-
 // <filesystem>
 
 // file_status symlink_status(const path& p);
@@ -55,6 +53,12 @@
     }
 }
 
+// Windows doesn't support setting perms::none to trigger failures
+// reading directories. Imaginary files under GetWindowsInaccessibleDir()
+// produce no_such_file_or_directory, not the error codes this test checks
+// for. Finally, status() for a too long file name doesn't return errors
+// on windows.
+#ifndef _WIN32
 TEST_CASE(test_symlink_status_cannot_resolve)
 {
     scoped_test_env env;
@@ -105,6 +109,7 @@
         TEST_CHECK(st.permissions() != perms::unknown);
     }
 }
+#endif
 
 
 TEST_CASE(symlink_status_file_types_test)