--- a/mach
+++ b/mach
@@ -66,27 +66,27 @@ def main(args):
     sys.exit(1)
 
 
 if __name__ == '__main__':
     if sys.platform == 'win32':
         # This is a complete hack to work around the fact that Windows
         # multiprocessing needs to import the original module (ie: this
         # file), but only works if it has a .py extension.
-	#
-	# We do this by a sort of two-level function interposing. The first
-	# level interposes forking.get_command_line() with our version defined
-	# in my_get_command_line(). Our version of get_command_line will
-	# replace the command string with the contents of the fork_interpose()
-	# function to be used in the subprocess.
-	#
-	# The subprocess then gets an interposed imp.find_module(), which we
-	# hack up to find 'mach' without the .py extension, since we already
-	# know where it is (it's us!). If we're not looking for 'mach', then
-	# the original find_module will suffice.
+        #
+        # We do this by a sort of two-level function interposing. The first
+        # level interposes forking.get_command_line() with our version defined
+        # in my_get_command_line(). Our version of get_command_line will
+        # replace the command string with the contents of the fork_interpose()
+        # function to be used in the subprocess.
+        #
+        # The subprocess then gets an interposed imp.find_module(), which we
+        # hack up to find 'mach' without the .py extension, since we already
+        # know where it is (it's us!). If we're not looking for 'mach', then
+        # the original find_module will suffice.
         #
         # See also: http://bugs.python.org/issue19946
         # And: https://bugzilla.mozilla.org/show_bug.cgi?id=914563
         import inspect
         from multiprocessing import forking
         global orig_command_line
 
         def fork_interpose():
@@ -101,17 +101,17 @@ if __name__ == '__main__':
                 return orig_find_module(name, dirs)
 
             imp.find_module = my_find_module
             from multiprocessing.forking import main; main()
 
         def my_get_command_line():
             fork_code, lineno = inspect.getsourcelines(fork_interpose)
             # Remove the first line (for 'def fork_interpose():') and the three
-	    # levels of indentation (12 spaces).
+            # levels of indentation (12 spaces).
             fork_string = ''.join(x[12:] for x in fork_code[1:])
             cmdline = orig_command_line()
             cmdline[2] = fork_string
             return cmdline
         orig_command_line = forking.get_command_line
         forking.get_command_line = my_get_command_line
 
     main(sys.argv[1:])

--- a/python/mozbuild/mozbuild/controller/building.py
+++ b/python/mozbuild/mozbuild/controller/building.py
@@ -176,22 +176,16 @@ class BuildMonitor(MozbuildObject):
 
     def start(self):
         """Record the start of the build."""
         self.start_time = time.time()
         self._finder_start_cpu = self._get_finder_cpu_usage()
 
     def start_resource_recording(self):
         # This should be merged into start() once bug 892342 lands.
-
-        # Resource monitoring on Windows is currently busted because of
-        # multiprocessing issues. Bug 914563.
-        if self._is_windows():
-            return
-
         self.resources.start()
         self._resources_started = True
 
     def on_line(self, line):
         """Consume a line of output from the build system.
 
         This will parse the line for state and determine whether more action is
         needed.