--- a/testing/mozharness/configs/builds/releng_base_windows_32_builds.py
+++ b/testing/mozharness/configs/builds/releng_base_windows_32_builds.py
@@ -66,17 +66,17 @@ config = {
         'MOZ_AUTOMATION': '1',
         'BINSCOPE': 'C:/Program Files (x86)/Microsoft/SDL BinScope/BinScope.exe',
         'HG_SHARE_BASE_DIR': 'C:/builds/hg-shared',
         'MOZ_CRASHREPORTER_NO_REPORT': '1',
         'MOZ_OBJDIR': 'obj-firefox',
         'PATH': 'C:/mozilla-build/nsis-3.0b1;C:/mozilla-build/python27;'
                 'C:/mozilla-build/buildbotve/scripts;'
                 '%s' % (os.environ.get('path')),
-        'PDBSTR_PATH': '/c/Program Files (x86)/Windows Kits/8.0/Debuggers/x64/srcsrv/pdbstr.exe',
+        'PDBSTR_PATH': 'C:/Program Files (x86)/Windows Kits/8.0/Debuggers/x64/srcsrv/pdbstr.exe',
         'PROPERTIES_FILE': os.path.join(os.getcwd(), 'buildprops.json'),
         'TINDERBOX_OUTPUT': '1',
         'TOOLTOOL_CACHE': 'c:/builds/tooltool_cache',
         'TOOLTOOL_HOME': '/c/builds',
     },
     'upload_env': {
         # stage_server is dictated from build_pool_specifics.py
         'UPLOAD_HOST': '%(stage_server)s',

--- a/testing/mozharness/configs/builds/releng_base_windows_64_builds.py
+++ b/testing/mozharness/configs/builds/releng_base_windows_64_builds.py
@@ -64,17 +64,17 @@ config = {
     'env': {
         'MOZ_AUTOMATION': '1',
         'HG_SHARE_BASE_DIR': 'C:/builds/hg-shared',
         'MOZ_CRASHREPORTER_NO_REPORT': '1',
         'MOZ_OBJDIR': 'obj-firefox',
         'PATH': 'C:/mozilla-build/nsis-3.0b1;C:/mozilla-build/python27;'
                 'C:/mozilla-build/buildbotve/scripts;'
                 '%s' % (os.environ.get('path')),
-        'PDBSTR_PATH': '/c/Program Files (x86)/Windows Kits/8.0/Debuggers/x64/srcsrv/pdbstr.exe',
+        'PDBSTR_PATH': 'C:/Program Files (x86)/Windows Kits/8.0/Debuggers/x64/srcsrv/pdbstr.exe',
         'PROPERTIES_FILE': os.path.join(os.getcwd(), 'buildprops.json'),
         'TINDERBOX_OUTPUT': '1',
         'TOOLTOOL_CACHE': 'c:/builds/tooltool_cache',
         'TOOLTOOL_HOME': '/c/builds',
     },
     'upload_env': {
         # stage_server is dictated from build_pool_specifics.py
         'UPLOAD_HOST': '%(stage_server)s',

--- a/testing/mozharness/configs/builds/taskcluster_firefox_win32_clang.py
+++ b/testing/mozharness/configs/builds/taskcluster_firefox_win32_clang.py
@@ -67,17 +67,17 @@ config = {
         'BINSCOPE': os.path.join(
             os.environ['ProgramFiles(x86)'], 'Microsoft', 'SDL BinScope', 'BinScope.exe'
         ),
         'HG_SHARE_BASE_DIR': os.path.join('y:', os.sep, 'hg-shared'),
         'MOZBUILD_STATE_PATH': os.path.join(os.getcwd(), '.mozbuild'),
         'MOZ_AUTOMATION': '1',
         'MOZ_CRASHREPORTER_NO_REPORT': '1',
         'MOZ_OBJDIR': 'obj-firefox',
-        'PDBSTR_PATH': '/c/Program Files (x86)/Windows Kits/10/Debuggers/x86/srcsrv/pdbstr.exe',
+        'PDBSTR_PATH': 'C:/Program Files (x86)/Windows Kits/10/Debuggers/x86/srcsrv/pdbstr.exe',
         'TINDERBOX_OUTPUT': '1',
         'TOOLTOOL_CACHE': 'c:/builds/tooltool_cache',
         'TOOLTOOL_HOME': '/c/builds',
         'MSYSTEM': 'MINGW32',
     },
     'upload_env': {
         'UPLOAD_HOST': 'localhost',
         'UPLOAD_PATH': os.path.join(os.getcwd(), 'public', 'build'),

--- a/testing/mozharness/configs/builds/taskcluster_firefox_win32_clang_debug.py
+++ b/testing/mozharness/configs/builds/taskcluster_firefox_win32_clang_debug.py
@@ -68,17 +68,17 @@ config = {
         'BINSCOPE': os.path.join(
             os.environ['ProgramFiles(x86)'], 'Microsoft', 'SDL BinScope', 'BinScope.exe'
         ),
         'HG_SHARE_BASE_DIR': os.path.join('y:', os.sep, 'hg-shared'),
         'MOZBUILD_STATE_PATH': os.path.join(os.getcwd(), '.mozbuild'),
         'MOZ_AUTOMATION': '1',
         'MOZ_CRASHREPORTER_NO_REPORT': '1',
         'MOZ_OBJDIR': 'obj-firefox',
-        'PDBSTR_PATH': '/c/Program Files (x86)/Windows Kits/10/Debuggers/x86/srcsrv/pdbstr.exe',
+        'PDBSTR_PATH': 'C:/Program Files (x86)/Windows Kits/10/Debuggers/x86/srcsrv/pdbstr.exe',
         'TINDERBOX_OUTPUT': '1',
         'TOOLTOOL_CACHE': 'c:/builds/tooltool_cache',
         'TOOLTOOL_HOME': '/c/builds',
         'XPCOM_DEBUG_BREAK': 'stack-and-abort',
         'MSYSTEM': 'MINGW32',
     },
     'upload_env': {
         'UPLOAD_HOST': 'localhost',

--- a/testing/mozharness/configs/builds/taskcluster_firefox_win32_qr_debug.py
+++ b/testing/mozharness/configs/builds/taskcluster_firefox_win32_qr_debug.py
@@ -69,17 +69,17 @@ config = {
         'BINSCOPE': os.path.join(
             os.environ['ProgramFiles(x86)'], 'Microsoft', 'SDL BinScope', 'BinScope.exe'
         ),
         'HG_SHARE_BASE_DIR': os.path.join('y:', os.sep, 'hg-shared'),
         'MOZBUILD_STATE_PATH': os.path.join(os.getcwd(), '.mozbuild'),
         'MOZ_AUTOMATION': '1',
         'MOZ_CRASHREPORTER_NO_REPORT': '1',
         'MOZ_OBJDIR': 'obj-firefox',
-        'PDBSTR_PATH': '/c/Program Files (x86)/Windows Kits/10/Debuggers/x86/srcsrv/pdbstr.exe',
+        'PDBSTR_PATH': 'C:/Program Files (x86)/Windows Kits/10/Debuggers/x86/srcsrv/pdbstr.exe',
         'TINDERBOX_OUTPUT': '1',
         'TOOLTOOL_CACHE': 'c:/builds/tooltool_cache',
         'TOOLTOOL_HOME': '/c/builds',
         'XPCOM_DEBUG_BREAK': 'stack-and-abort',
         'MSYSTEM': 'MINGW32',
     },
     'upload_env': {
         'UPLOAD_HOST': 'localhost',

--- a/testing/mozharness/configs/builds/taskcluster_firefox_win32_qr_opt.py
+++ b/testing/mozharness/configs/builds/taskcluster_firefox_win32_qr_opt.py
@@ -68,17 +68,17 @@ config = {
         'BINSCOPE': os.path.join(
             os.environ['ProgramFiles(x86)'], 'Microsoft', 'SDL BinScope', 'BinScope.exe'
         ),
         'HG_SHARE_BASE_DIR': os.path.join('y:', os.sep, 'hg-shared'),
         'MOZBUILD_STATE_PATH': os.path.join(os.getcwd(), '.mozbuild'),
         'MOZ_AUTOMATION': '1',
         'MOZ_CRASHREPORTER_NO_REPORT': '1',
         'MOZ_OBJDIR': 'obj-firefox',
-        'PDBSTR_PATH': '/c/Program Files (x86)/Windows Kits/10/Debuggers/x86/srcsrv/pdbstr.exe',
+        'PDBSTR_PATH': 'C:/Program Files (x86)/Windows Kits/10/Debuggers/x86/srcsrv/pdbstr.exe',
         'TINDERBOX_OUTPUT': '1',
         'TOOLTOOL_CACHE': 'c:/builds/tooltool_cache',
         'TOOLTOOL_HOME': '/c/builds',
         'MSYSTEM': 'MINGW32',
     },
     'upload_env': {
         'UPLOAD_HOST': 'localhost',
         'UPLOAD_PATH': os.path.join(os.getcwd(), 'public', 'build'),

--- a/testing/mozharness/configs/builds/taskcluster_firefox_win64_clang.py
+++ b/testing/mozharness/configs/builds/taskcluster_firefox_win64_clang.py
@@ -63,17 +63,17 @@ config = {
     'platform': 'win64',
     'stage_platform': 'win64-st-an',
     'publish_nightly_en_US_routes': True,
     'env': {
         'HG_SHARE_BASE_DIR': os.path.join('y:', os.sep, 'hg-shared'),
         'MOZ_AUTOMATION': '1',
         'MOZ_CRASHREPORTER_NO_REPORT': '1',
         'MOZ_OBJDIR': 'obj-firefox',
-        'PDBSTR_PATH': '/c/Program Files (x86)/Windows Kits/10/Debuggers/x64/srcsrv/pdbstr.exe',
+        'PDBSTR_PATH': 'C:/Program Files (x86)/Windows Kits/10/Debuggers/x64/srcsrv/pdbstr.exe',
         'TINDERBOX_OUTPUT': '1',
         'TOOLTOOL_CACHE': 'c:/builds/tooltool_cache',
         'TOOLTOOL_HOME': '/c/builds',
         'MSYSTEM': 'MINGW32',
     },
     'upload_env': {
         'UPLOAD_HOST': 'localhost',
         'UPLOAD_PATH': os.path.join(os.getcwd(), 'public', 'build'),

--- a/testing/mozharness/configs/builds/taskcluster_firefox_win64_clang_debug.py
+++ b/testing/mozharness/configs/builds/taskcluster_firefox_win64_clang_debug.py
@@ -64,17 +64,17 @@ config = {
     'stage_platform': 'win64-st-an-debug',
     'debug_build': True,
     'publish_nightly_en_US_routes': True,
     'env': {
         'HG_SHARE_BASE_DIR': os.path.join('y:', os.sep, 'hg-shared'),
         'MOZ_AUTOMATION': '1',
         'MOZ_CRASHREPORTER_NO_REPORT': '1',
         'MOZ_OBJDIR': 'obj-firefox',
-        'PDBSTR_PATH': '/c/Program Files (x86)/Windows Kits/10/Debuggers/x64/srcsrv/pdbstr.exe',
+        'PDBSTR_PATH': 'C:/Program Files (x86)/Windows Kits/10/Debuggers/x64/srcsrv/pdbstr.exe',
         'TINDERBOX_OUTPUT': '1',
         'TOOLTOOL_CACHE': 'c:/builds/tooltool_cache',
         'TOOLTOOL_HOME': '/c/builds',
         'XPCOM_DEBUG_BREAK': 'stack-and-abort',
         'MSYSTEM': 'MINGW32',
     },
     'upload_env': {
         'UPLOAD_HOST': 'localhost',

--- a/testing/mozharness/configs/builds/taskcluster_firefox_win64_qr_debug.py
+++ b/testing/mozharness/configs/builds/taskcluster_firefox_win64_qr_debug.py
@@ -60,17 +60,17 @@ config = {
     'stage_platform': 'win64-debug',
     'debug_build': True,
     'publish_nightly_en_US_routes': True,
     'env': {
         'HG_SHARE_BASE_DIR': os.path.join('y:', os.sep, 'hg-shared'),
         'MOZ_AUTOMATION': '1',
         'MOZ_CRASHREPORTER_NO_REPORT': '1',
         'MOZ_OBJDIR': 'obj-firefox',
-        'PDBSTR_PATH': '/c/Program Files (x86)/Windows Kits/10/Debuggers/x64/srcsrv/pdbstr.exe',
+        'PDBSTR_PATH': 'C:/Program Files (x86)/Windows Kits/10/Debuggers/x64/srcsrv/pdbstr.exe',
         'TINDERBOX_OUTPUT': '1',
         'TOOLTOOL_CACHE': 'c:/builds/tooltool_cache',
         'TOOLTOOL_HOME': '/c/builds',
         'XPCOM_DEBUG_BREAK': 'stack-and-abort',
         'MSYSTEM': 'MINGW32',
     },
     'upload_env': {
         'UPLOAD_HOST': 'localhost',

--- a/testing/mozharness/configs/builds/taskcluster_firefox_win64_qr_opt.py
+++ b/testing/mozharness/configs/builds/taskcluster_firefox_win64_qr_opt.py
@@ -59,17 +59,17 @@ config = {
     'platform': 'win64',
     'stage_platform': 'win64',
     'publish_nightly_en_US_routes': True,
     'env': {
         'HG_SHARE_BASE_DIR': os.path.join('y:', os.sep, 'hg-shared'),
         'MOZ_AUTOMATION': '1',
         'MOZ_CRASHREPORTER_NO_REPORT': '1',
         'MOZ_OBJDIR': 'obj-firefox',
-        'PDBSTR_PATH': '/c/Program Files (x86)/Windows Kits/10/Debuggers/x64/srcsrv/pdbstr.exe',
+        'PDBSTR_PATH': 'C:/Program Files (x86)/Windows Kits/10/Debuggers/x64/srcsrv/pdbstr.exe',
         'TINDERBOX_OUTPUT': '1',
         'TOOLTOOL_CACHE': 'c:/builds/tooltool_cache',
         'TOOLTOOL_HOME': '/c/builds',
         'MSYSTEM': 'MINGW32',
     },
     'upload_env': {
         'UPLOAD_HOST': 'localhost',
         'UPLOAD_PATH': os.path.join(os.getcwd(), 'public', 'build'),

--- a/testing/mozharness/configs/builds/taskcluster_firefox_windows_32_addondevel.py
+++ b/testing/mozharness/configs/builds/taskcluster_firefox_windows_32_addondevel.py
@@ -68,17 +68,17 @@ config = {
         'BINSCOPE': os.path.join(
             os.environ['ProgramFiles(x86)'], 'Microsoft', 'SDL BinScope', 'BinScope.exe'
         ),
         'HG_SHARE_BASE_DIR': os.path.join('y:', os.sep, 'hg-shared'),
         'MOZBUILD_STATE_PATH': os.path.join(os.getcwd(), '.mozbuild'),
         'MOZ_AUTOMATION': '1',
         'MOZ_CRASHREPORTER_NO_REPORT': '1',
         'MOZ_OBJDIR': 'obj-firefox',
-        'PDBSTR_PATH': '/c/Program Files (x86)/Windows Kits/10/Debuggers/x86/srcsrv/pdbstr.exe',
+        'PDBSTR_PATH': 'C:/Program Files (x86)/Windows Kits/10/Debuggers/x86/srcsrv/pdbstr.exe',
         'TINDERBOX_OUTPUT': '1',
         'TOOLTOOL_CACHE': 'c:/builds/tooltool_cache',
         'TOOLTOOL_HOME': '/c/builds',
         'MSYSTEM': 'MINGW32',
     },
     'upload_env': {
         'UPLOAD_HOST': 'localhost',
         'UPLOAD_PATH': os.path.join(os.getcwd(), 'public', 'build'),

--- a/testing/mozharness/configs/builds/taskcluster_firefox_windows_32_debug.py
+++ b/testing/mozharness/configs/builds/taskcluster_firefox_windows_32_debug.py
@@ -69,17 +69,17 @@ config = {
         'BINSCOPE': os.path.join(
             os.environ['ProgramFiles(x86)'], 'Microsoft', 'SDL BinScope', 'BinScope.exe'
         ),
         'HG_SHARE_BASE_DIR': os.path.join('y:', os.sep, 'hg-shared'),
         'MOZBUILD_STATE_PATH': os.path.join(os.getcwd(), '.mozbuild'),
         'MOZ_AUTOMATION': '1',
         'MOZ_CRASHREPORTER_NO_REPORT': '1',
         'MOZ_OBJDIR': 'obj-firefox',
-        'PDBSTR_PATH': '/c/Program Files (x86)/Windows Kits/10/Debuggers/x86/srcsrv/pdbstr.exe',
+        'PDBSTR_PATH': 'C:/Program Files (x86)/Windows Kits/10/Debuggers/x86/srcsrv/pdbstr.exe',
         'TINDERBOX_OUTPUT': '1',
         'TOOLTOOL_CACHE': 'c:/builds/tooltool_cache',
         'TOOLTOOL_HOME': '/c/builds',
         'XPCOM_DEBUG_BREAK': 'stack-and-abort',
         'MSYSTEM': 'MINGW32',
     },
     'upload_env': {
         'UPLOAD_HOST': 'localhost',

--- a/testing/mozharness/configs/builds/taskcluster_firefox_windows_32_opt.py
+++ b/testing/mozharness/configs/builds/taskcluster_firefox_windows_32_opt.py
@@ -68,17 +68,17 @@ config = {
         'BINSCOPE': os.path.join(
             os.environ['ProgramFiles(x86)'], 'Microsoft', 'SDL BinScope', 'BinScope.exe'
         ),
         'HG_SHARE_BASE_DIR': os.path.join('y:', os.sep, 'hg-shared'),
         'MOZBUILD_STATE_PATH': os.path.join(os.getcwd(), '.mozbuild'),
         'MOZ_AUTOMATION': '1',
         'MOZ_CRASHREPORTER_NO_REPORT': '1',
         'MOZ_OBJDIR': 'obj-firefox',
-        'PDBSTR_PATH': '/c/Program Files (x86)/Windows Kits/10/Debuggers/x86/srcsrv/pdbstr.exe',
+        'PDBSTR_PATH': 'C:/Program Files (x86)/Windows Kits/10/Debuggers/x86/srcsrv/pdbstr.exe',
         'TINDERBOX_OUTPUT': '1',
         'TOOLTOOL_CACHE': 'c:/builds/tooltool_cache',
         'TOOLTOOL_HOME': '/c/builds',
         'MSYSTEM': 'MINGW32',
     },
     'upload_env': {
         'UPLOAD_HOST': 'localhost',
         'UPLOAD_PATH': os.path.join(os.getcwd(), 'public', 'build'),

--- a/testing/mozharness/configs/builds/taskcluster_firefox_windows_64_addondevel.py
+++ b/testing/mozharness/configs/builds/taskcluster_firefox_windows_64_addondevel.py
@@ -65,17 +65,17 @@ config = {
     'platform': 'win64',
     'stage_platform': 'win64-add-on-devel',
     'publish_nightly_en_US_routes': False,
     'env': {
         'HG_SHARE_BASE_DIR': os.path.join('y:', os.sep, 'hg-shared'),
         'MOZ_AUTOMATION': '1',
         'MOZ_CRASHREPORTER_NO_REPORT': '1',
         'MOZ_OBJDIR': 'obj-firefox',
-        'PDBSTR_PATH': '/c/Program Files (x86)/Windows Kits/10/Debuggers/x64/srcsrv/pdbstr.exe',
+        'PDBSTR_PATH': 'C:/Program Files (x86)/Windows Kits/10/Debuggers/x64/srcsrv/pdbstr.exe',
         'TINDERBOX_OUTPUT': '1',
         'TOOLTOOL_CACHE': 'c:/builds/tooltool_cache',
         'TOOLTOOL_HOME': '/c/builds',
         'MSYSTEM': 'MINGW32',
     },
     'upload_env': {
         'UPLOAD_HOST': 'localhost',
         'UPLOAD_PATH': os.path.join(os.getcwd(), 'public', 'build'),

--- a/testing/mozharness/configs/builds/taskcluster_firefox_windows_64_debug.py
+++ b/testing/mozharness/configs/builds/taskcluster_firefox_windows_64_debug.py
@@ -65,17 +65,17 @@ config = {
     'stage_platform': 'win64-debug',
     'debug_build': True,
     'publish_nightly_en_US_routes': True,
     'env': {
         'HG_SHARE_BASE_DIR': os.path.join('y:', os.sep, 'hg-shared'),
         'MOZ_AUTOMATION': '1',
         'MOZ_CRASHREPORTER_NO_REPORT': '1',
         'MOZ_OBJDIR': 'obj-firefox',
-        'PDBSTR_PATH': '/c/Program Files (x86)/Windows Kits/10/Debuggers/x64/srcsrv/pdbstr.exe',
+        'PDBSTR_PATH': 'C:/Program Files (x86)/Windows Kits/10/Debuggers/x64/srcsrv/pdbstr.exe',
         'TINDERBOX_OUTPUT': '1',
         'TOOLTOOL_CACHE': 'c:/builds/tooltool_cache',
         'TOOLTOOL_HOME': '/c/builds',
         'XPCOM_DEBUG_BREAK': 'stack-and-abort',
         'MSYSTEM': 'MINGW32',
     },
     'upload_env': {
         'UPLOAD_HOST': 'localhost',

--- a/testing/mozharness/configs/builds/taskcluster_firefox_windows_64_opt.py
+++ b/testing/mozharness/configs/builds/taskcluster_firefox_windows_64_opt.py
@@ -64,17 +64,17 @@ config = {
     'platform': 'win64',
     'stage_platform': 'win64',
     'publish_nightly_en_US_routes': True,
     'env': {
         'HG_SHARE_BASE_DIR': os.path.join('y:', os.sep, 'hg-shared'),
         'MOZ_AUTOMATION': '1',
         'MOZ_CRASHREPORTER_NO_REPORT': '1',
         'MOZ_OBJDIR': 'obj-firefox',
-        'PDBSTR_PATH': '/c/Program Files (x86)/Windows Kits/10/Debuggers/x64/srcsrv/pdbstr.exe',
+        'PDBSTR_PATH': 'C:/Program Files (x86)/Windows Kits/10/Debuggers/x64/srcsrv/pdbstr.exe',
         'TINDERBOX_OUTPUT': '1',
         'TOOLTOOL_CACHE': 'c:/builds/tooltool_cache',
         'TOOLTOOL_HOME': '/c/builds',
         'MSYSTEM': 'MINGW32',
     },
     'upload_env': {
         'UPLOAD_HOST': 'localhost',
         'UPLOAD_PATH': os.path.join(os.getcwd(), 'public', 'build'),