Index: lit/Breakpoint/case-insensitive.test
===================================================================
--- lit/Breakpoint/case-insensitive.test
+++ lit/Breakpoint/case-insensitive.test
@@ -1,4 +1,6 @@
 # REQUIRES: windows
+# XFAIL: windows
+# -> llvm.org/pr24528
 #
 # RUN: %cc %p/Inputs/case-sensitive.c -g -o %t
 # RUN: lldb-test breakpoints %t %s | FileCheck %s
Index: packages/Python/lldbsuite/test/functionalities/command_script/TestCommandScript.py
===================================================================
--- packages/Python/lldbsuite/test/functionalities/command_script/TestCommandScript.py
+++ packages/Python/lldbsuite/test/functionalities/command_script/TestCommandScript.py
@@ -8,6 +8,7 @@
 import os
 import time
 import lldb
+from lldbsuite.test.decorators import *
 from lldbsuite.test.lldbtest import *
 
 
@@ -15,6 +16,7 @@
 
     mydir = TestBase.compute_mydir(__file__)
 
+    @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr32343")
     def test(self):
         self.build()
         self.pycmd_tests()
Index: packages/Python/lldbsuite/test/functionalities/frame-language/TestGuessLanguage.py
===================================================================
--- packages/Python/lldbsuite/test/functionalities/frame-language/TestGuessLanguage.py
+++ packages/Python/lldbsuite/test/functionalities/frame-language/TestGuessLanguage.py
@@ -10,6 +10,7 @@
 import re
 import lldb
 import lldbsuite.test.lldbutil as lldbutil
+from lldbsuite.test.decorators import *
 from lldbsuite.test.lldbtest import *
 
 
@@ -22,6 +23,7 @@
     # each debug info format.
     NO_DEBUG_INFO_TESTCASE = True
 
+    @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr37658")
     def test_guess_language(self):
         """Test GuessLanguage for C and C++."""
         self.build()
Index: packages/Python/lldbsuite/test/functionalities/inline-stepping/TestInlineStepping.py
===================================================================
--- packages/Python/lldbsuite/test/functionalities/inline-stepping/TestInlineStepping.py
+++ packages/Python/lldbsuite/test/functionalities/inline-stepping/TestInlineStepping.py
@@ -20,6 +20,7 @@
     @expectedFailureAll(
         compiler="icc",
         bugnumber="# Not really a bug.  ICC combines two inlined functions.")
+    @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr32343")
     def test_with_python_api(self):
         """Test stepping over and into inlined functions."""
         self.build()
@@ -32,6 +33,7 @@
         self.inline_stepping_step_over()
 
     @add_test_categories(['pyapi'])
+    @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr32343")
     def test_step_in_template_with_python_api(self):
         """Test stepping in to templated functions."""
         self.build()
Index: packages/Python/lldbsuite/test/functionalities/postmortem/minidump/TestMiniDump.py
===================================================================
--- packages/Python/lldbsuite/test/functionalities/postmortem/minidump/TestMiniDump.py
+++ packages/Python/lldbsuite/test/functionalities/postmortem/minidump/TestMiniDump.py
@@ -100,6 +100,7 @@
             self.assertTrue(frame.GetModule().IsValid())
 
     @skipUnlessWindows # Minidump saving works only on windows
+    @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr32343")
     def test_deeper_stack_in_mini_dump(self):
         """Test that we can examine a more interesting stack in a mini dump."""
         self.build()
@@ -136,6 +137,7 @@
                 os.unlink(core)
 
     @skipUnlessWindows # Minidump saving works only on windows
+    @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr32343")
     def test_local_variables_in_mini_dump(self):
         """Test that we can examine local variables in a mini dump."""
         self.build()
Index: packages/Python/lldbsuite/test/functionalities/register/register_command/TestRegisters.py
===================================================================
--- packages/Python/lldbsuite/test/functionalities/register/register_command/TestRegisters.py
+++ packages/Python/lldbsuite/test/functionalities/register/register_command/TestRegisters.py
@@ -59,6 +59,7 @@
     # problem
     @skipIfTargetAndroid(archs=["i386"])
     @skipIf(archs=no_match(['amd64', 'arm', 'i386', 'x86_64']))
+    @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr37683")
     def test_fp_register_write(self):
         """Test commands that write to registers, in particular floating-point registers."""
         self.build()
@@ -70,6 +71,7 @@
     @skipIfFreeBSD  # llvm.org/pr25057
     @skipIf(archs=no_match(['amd64', 'i386', 'x86_64']))
     @skipIfOutOfTreeDebugserver
+    @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr37683")
     def test_fp_special_purpose_register_read(self):
         """Test commands that read fpu special purpose registers."""
         self.build()
@@ -77,6 +79,7 @@
 
     @skipIfiOSSimulator
     @skipIf(archs=no_match(['amd64', 'arm', 'i386', 'x86_64']))
+    @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr37683")
     def test_register_expressions(self):
         """Test expression evaluation with commands related to registers."""
         self.build()
@@ -105,6 +108,7 @@
 
     @skipIfiOSSimulator
     @skipIf(archs=no_match(['amd64', 'x86_64']))
+    @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr37683")
     def test_convenience_registers(self):
         """Test convenience registers."""
         self.build()
@@ -112,6 +116,7 @@
 
     @skipIfiOSSimulator
     @skipIf(archs=no_match(['amd64', 'x86_64']))
+    @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr37683")
     def test_convenience_registers_with_process_attach(self):
         """Test convenience registers after a 'process attach'."""
         self.build()
@@ -119,6 +124,7 @@
 
     @skipIfiOSSimulator
     @skipIf(archs=no_match(['amd64', 'x86_64']))
+    @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr37683")
     def test_convenience_registers_16bit_with_process_attach(self):
         """Test convenience registers after a 'process attach'."""
         self.build()
@@ -372,6 +378,8 @@
             self.write_and_read(currentFrame, reg, val, must)
 
         if self.getArchitecture() in ['amd64', 'i386', 'x86_64']:
+            if st0regname is None:
+                self.fail("st0regname could not be determined")
             self.runCmd(
                 "register write " +
                 st0regname +
Index: packages/Python/lldbsuite/test/functionalities/step-avoids-no-debug/TestStepNoDebug.py
===================================================================
--- packages/Python/lldbsuite/test/functionalities/step-avoids-no-debug/TestStepNoDebug.py
+++ packages/Python/lldbsuite/test/functionalities/step-avoids-no-debug/TestStepNoDebug.py
@@ -20,6 +20,7 @@
     mydir = TestBase.compute_mydir(__file__)
 
     @add_test_categories(['pyapi'])
+    @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr32343")
     def test_step_out_with_python(self):
         """Test stepping out using avoid-no-debug with dsyms."""
         self.build()
@@ -36,6 +37,7 @@
             "3.9"],
         archs=["i386"],
         bugnumber="llvm.org/pr28549")
+    @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr32343")
     def test_step_over_with_python(self):
         """Test stepping over using avoid-no-debug with dwarf."""
         self.build()
@@ -53,6 +55,7 @@
         archs=["i386"],
         bugnumber="llvm.org/pr28549")
     @expectedFailureAll(oslist=["ios", "tvos", "bridgeos"], bugnumber="<rdar://problem/34026777>")  # lldb doesn't step past last source line in function on arm64
+    @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr32343")
     def test_step_in_with_python(self):
         """Test stepping in using avoid-no-debug with dwarf."""
         self.build()
Index: packages/Python/lldbsuite/test/functionalities/thread/jump/TestThreadJump.py
===================================================================
--- packages/Python/lldbsuite/test/functionalities/thread/jump/TestThreadJump.py
+++ packages/Python/lldbsuite/test/functionalities/thread/jump/TestThreadJump.py
@@ -17,6 +17,7 @@
 
     mydir = TestBase.compute_mydir(__file__)
 
+    @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr32343")
     def test(self):
         """Test thread jump handling."""
         self.build(dictionary=self.getBuildFlags())
Index: packages/Python/lldbsuite/test/functionalities/thread/num_threads/TestNumThreads.py
===================================================================
--- packages/Python/lldbsuite/test/functionalities/thread/num_threads/TestNumThreads.py
+++ packages/Python/lldbsuite/test/functionalities/thread/num_threads/TestNumThreads.py
@@ -63,6 +63,7 @@
             'Number of expected threads and actual threads do not match.')
 
     @skipIfDarwin # rdar://33462362
+    @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr37658")
     def test_unique_stacks(self):
         """Test backtrace unique with multiple threads executing the same stack."""
         self.build()
Index: packages/Python/lldbsuite/test/lang/c/conflicting-symbol/TestConflictingSymbol.py
===================================================================
--- packages/Python/lldbsuite/test/lang/c/conflicting-symbol/TestConflictingSymbol.py
+++ packages/Python/lldbsuite/test/lang/c/conflicting-symbol/TestConflictingSymbol.py
@@ -21,6 +21,7 @@
         lldbutil.mkdir_p(self.getBuildArtifact("One"))
         lldbutil.mkdir_p(self.getBuildArtifact("Two"))
 
+    @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr24489")
     def test_conflicting_symbols(self):
         self.build()
         exe = self.getBuildArtifact("a.out")
Index: packages/Python/lldbsuite/test/lang/c/step-target/TestStepTarget.py
===================================================================
--- packages/Python/lldbsuite/test/lang/c/step-target/TestStepTarget.py
+++ packages/Python/lldbsuite/test/lang/c/step-target/TestStepTarget.py
@@ -52,6 +52,7 @@
         thread = threads[0]
         return thread
 
+    @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr32343")
     def test_with_end_line(self):
         """Test stepping over vrs. hitting breakpoints & subsequent stepping in various forms."""
 
@@ -63,6 +64,7 @@
 
         self.assertTrue(frame.name == "lotsOfArgs", "Stepped to lotsOfArgs.")
 
+    @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr32343")
     def test_with_end_line_bad_name(self):
         """Test stepping over vrs. hitting breakpoints & subsequent stepping in various forms."""
 
@@ -75,6 +77,7 @@
             frame.line_entry.line == self.end_line,
             "Stepped to the block end.")
 
+    @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr32343")
     def test_with_end_line_deeper(self):
         """Test stepping over vrs. hitting breakpoints & subsequent stepping in various forms."""
 
@@ -85,6 +88,7 @@
         frame = thread.frames[0]
         self.assertTrue(frame.name == "modifyInt", "Stepped to modifyInt.")
 
+    @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr32343")
     def test_with_command_and_block(self):
         """Test stepping over vrs. hitting breakpoints & subsequent stepping in various forms."""
 
@@ -100,6 +104,7 @@
         frame = thread.frames[0]
         self.assertTrue(frame.name == "lotsOfArgs", "Stepped to lotsOfArgs.")
 
+    @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr32343")
     def test_with_command_and_block_and_bad_name(self):
         """Test stepping over vrs. hitting breakpoints & subsequent stepping in various forms."""
 
Index: packages/Python/lldbsuite/test/lang/cpp/class_static/TestStaticVariables.py
===================================================================
--- packages/Python/lldbsuite/test/lang/cpp/class_static/TestStaticVariables.py
+++ packages/Python/lldbsuite/test/lang/cpp/class_static/TestStaticVariables.py
@@ -64,6 +64,7 @@
         compiler_version=["<", "3.9"],
         bugnumber='llvm.org/pr20550')
     @add_test_categories(['pyapi'])
+    @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr24764")
     def test_with_python_api(self):
         """Test Python APIs on file and class static variables."""
         self.build()
Index: packages/Python/lldbsuite/test/lang/cpp/namespace/TestNamespace.py
===================================================================
--- packages/Python/lldbsuite/test/lang/cpp/namespace/TestNamespace.py
+++ packages/Python/lldbsuite/test/lang/cpp/namespace/TestNamespace.py
@@ -48,6 +48,7 @@
                 "make sure breakpoint locations are correct for 'func' with eFunctionNameTypeAuto")
 
     @expectedFailureAll(bugnumber="llvm.org/pr28548", compiler="gcc")
+    @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr24489")
     def test_breakpoints_func_full(self):
         """Test that we can set breakpoints correctly by fullname to find all functions whose fully qualified name is "func"
            (no namespaces)."""
Index: packages/Python/lldbsuite/test/lang/cpp/signed_types/TestSignedTypes.py
===================================================================
--- packages/Python/lldbsuite/test/lang/cpp/signed_types/TestSignedTypes.py
+++ packages/Python/lldbsuite/test/lang/cpp/signed_types/TestSignedTypes.py
@@ -9,6 +9,7 @@
 import time
 import re
 import lldb
+from lldbsuite.test.decorators import *
 from lldbsuite.test.lldbtest import *
 import lldbsuite.test.lldbutil as lldbutil
 
@@ -25,6 +26,7 @@
         self.line = line_number(
             self.source, '// Set break point at this line.')
 
+    @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr24489")
     def test(self):
         """Test that variables with signed types display correctly."""
         self.build()
Index: packages/Python/lldbsuite/test/lang/cpp/template/TestTemplateArgs.py
===================================================================
--- packages/Python/lldbsuite/test/lang/cpp/template/TestTemplateArgs.py
+++ packages/Python/lldbsuite/test/lang/cpp/template/TestTemplateArgs.py
@@ -83,6 +83,7 @@
             expr_result.GetType().GetName() == "int",
             'expr_result.GetType().GetName() == "int"')
 
+    @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr24489")
     def test_template_template_args(self):
         frame = self.prepareProcess()
 
Index: packages/Python/lldbsuite/test/python_api/function_symbol/TestDisasmAPI.py
===================================================================
--- packages/Python/lldbsuite/test/python_api/function_symbol/TestDisasmAPI.py
+++ packages/Python/lldbsuite/test/python_api/function_symbol/TestDisasmAPI.py
@@ -28,6 +28,7 @@
             'main.c', '// Find the line number for breakpoint 2 here.')
 
     @add_test_categories(['pyapi'])
+    @expectedFailureAll(oslist=["windows"], bugnumber='llvm.org/pr21765')
     def test(self):
         """Exercise getting SBAddress objects, disassembly, and SBAddress APIs."""
         self.build()
Index: packages/Python/lldbsuite/test/python_api/function_symbol/TestSymbolAPI.py
===================================================================
--- packages/Python/lldbsuite/test/python_api/function_symbol/TestSymbolAPI.py
+++ packages/Python/lldbsuite/test/python_api/function_symbol/TestSymbolAPI.py
@@ -28,6 +28,7 @@
             'main.c', '// Find the line number for breakpoint 2 here.')
 
     @add_test_categories(['pyapi'])
+    @expectedFailureAll(oslist=["windows"], bugnumber='llvm.org/pr21765')
     def test(self):
         """Exercise some SBSymbol and SBAddress APIs."""
         self.build()
Index: packages/Python/lldbsuite/test/python_api/name_lookup/TestNameLookup.py
===================================================================
--- packages/Python/lldbsuite/test/python_api/name_lookup/TestNameLookup.py
+++ packages/Python/lldbsuite/test/python_api/name_lookup/TestNameLookup.py
@@ -20,6 +20,7 @@
     mydir = TestBase.compute_mydir(__file__)
 
     @add_test_categories(['pyapi'])
+    @expectedFailureAll(oslist=["windows"], bugnumber='llvm.org/pr21765')
     def test_target(self):
         """Exercise SBTarget.FindFunctions() with various name masks.
         
Index: packages/Python/lldbsuite/test/python_api/target/TestTargetAPI.py
===================================================================
--- packages/Python/lldbsuite/test/python_api/target/TestTargetAPI.py
+++ packages/Python/lldbsuite/test/python_api/target/TestTargetAPI.py
@@ -61,6 +61,7 @@
         self.get_description()
 
     @add_test_categories(['pyapi'])
+    @expectedFailureAll(oslist=["windows"], bugnumber='llvm.org/pr21765')
     def test_resolve_symbol_context_with_address(self):
         """Exercise SBTarget.ResolveSymbolContextForAddress() API."""
         self.build()
Index: packages/Python/lldbsuite/test/python_api/thread/TestThreadAPI.py
===================================================================
--- packages/Python/lldbsuite/test/python_api/thread/TestThreadAPI.py
+++ packages/Python/lldbsuite/test/python_api/thread/TestThreadAPI.py
@@ -51,6 +51,7 @@
         self.step_out_of_malloc_into_function_b(self.exe_name)
 
     @add_test_categories(['pyapi'])
+    @expectedFailureAll(oslist=["windows"], bugnumber='llvm.org/pr32343')
     def test_step_over_3_times(self):
         """Test Python SBThread.StepOver() API."""
         # We build a different executable than the default build() does.