NVDA Windows Vista error

ERROR - core.CorePump.run (17:34:24.605) - MainThread (5172):
errors in this core pump cycle
Traceback (most recent call last):
  File "winAPI\sessionTracking.pyc", line 240, in _getCurrentSessionInfoEx
RuntimeError: Failure calling WTSQuerySessionInformationW: 0

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "core.pyc", line 715, in run
  File "winAPI\sessionTracking.pyc", line 127, in pumpAll
  File "winAPI\sessionTracking.pyc", line 147, in _isWindowsLocked
  File "baseObject.pyc", line 62, in __get__
  File "baseObject.pyc", line 168, in _getPropertyViaCache
  File "winAPI\sessionTracking.pyc", line 115, in _get_isWindowsLocked
  File "winAPI\sessionTracking.pyc", line 178, in _isWindowsLocked_checkViaSessionQuery
  File "winAPI\sessionTracking.pyc", line 272, in _getSessionLockedValue
  File "contextlib.pyc", line 112, in __enter__
  File "winAPI\sessionTracking.pyc", line 200, in WTSCurrentSessionInfoEx
  File "winAPI\sessionTracking.pyc", line 261, in _getCurrentSessionInfoEx
  File "logHandler.pyc", line 216, in exception
TypeError: 'RuntimeError' object is not subscriptable