[Windows] No Mapping between account names and Security Id was done

[vikilpet]

Windows Sever 2012 R2 Standard

• Microsoft Windows [Version 6.3.9600]
• psutil version: 5.7.3
• python version Python 3.8.5 (tags/v3.8.5:580fbb0, Jul 20 2020, 15:43:08) 32-bit
  Terminal server

Bug description
Python with elevated privileges

>>> import psutil
>>> for p in psutil.process_iter(ad_value=''): print(p.username())
NT AUTHORITY\SYSTEM
NT AUTHORITY\SYSTEM
...
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Users\adm\AppData\Roaming\Python\Python38\site-packages\psutil\__init__.py", line 715, in username
    return self._proc.username()
  File "C:\Users\adm\AppData\Roaming\Python\Python38\site-packages\psutil\_pswindows.py", line 681, in wrapper
    raise convert_oserror(err, pid=self.pid, name=self._name)
  File "C:\Users\adm\AppData\Roaming\Python\Python38\site-packages\psutil\_pswindows.py", line 671, in convert_oserror
    raise exc
  File "C:\Users\adm\AppData\Roaming\Python\Python38\site-packages\psutil\_pswindows.py", line 679, in wrapper
    return fun(self, *args, **kwargs)
  File "C:\Users\adm\AppData\Roaming\Python\Python38\site-packages\psutil\_pswindows.py", line 926, in username
    domain, user = cext.proc_username(self.pid)
OSError: [WinError 1332] No Mapping between account names and Security Id was done: '(originated from LookupAccountSidW)'

These bad processes are 'dwm.exe' of non-admin remote desktop users.
It can be monkey patched like that, in _pswindows.py:

    try:
        domain, user = cext.proc_username(self.pid)
    except OSError:
        domain, user = '-', '-'