Should I block it?

No, this file is 100% safe to run.

Additional versions

6.3.9600.16384 (winblue_rtm.130821-1623)	1.84%
6.3.9600.16384 (winblue_rtm.130821-1623)	0.09%
6.3.9600.16384 (winblue_rtm.130821-1623)	2.62%
6.3.9431.0 (winmain_bluemp.130615-1214)	0.28%
6.3.9431.0 (winmain_bluemp.130615-1214)	0.05%
6.2.9200.16384 (win8_rtm.120725-1247)	2.02%
6.2.9200.16384 (win8_rtm.120725-1247)	8.56%
6.2.9200.16384 (win8_rtm.120725-1247)	5.47%
6.2.9200.16384 (win8_rtm.120725-1247)	0.37%
6.2.8400.0 (winmain_win8rc.120518-1423)	0.09%
6.2.8400.0 (winmain_win8rc.120518-1423)	0.09%
6.2.8250.0 (winmain_win8beta.120217-1520)	0.05%
6.2.8102.0 (winmain_win8m3.110823-1455)	0.09%
6.1.7600.16385 (win7_rtm.090713-1255)	5.80%
6.1.7600.16385 (win7_rtm.090713-1255)	40.94%
6.1.7600.16385 (win7_rtm.090713-1255)	19.46%
6.1.7600.16385 (win7_rtm.090713-1255)	3.73%
6.1.7600.16385 (win7_rtm.090713-1255)	0.05%
6.1.7600.16384 (win7_rtm.090710-1945)	0.05%
6.0.6001.18000 (longhorn_rtm.080118-1840)	6.07%
6.0.6001.18000 (longhorn_rtm.080118-1840)	0.05%
6.0.6001.18000 (longhorn_rtm.080118-1840)	1.43%
6.0.6001.18000 (longhorn_rtm.080118-1840)	0.55%
6.0.6000.16386 (vista_rtm.061101-2205)	0.09%
6.0.6000.16386 (vista_rtm.061101-2205)	0.18%

Relationships

Parent process

services.exe (Services and Controller app by Microsoft)

Related files

tiworker.exe (Windows Modules Installer Worker by Microsoft)

PE file structure

Show functions

Import table

advapi32.dll

SetServiceStatus, RegCloseKey, RegOpenKeyExW, RegisterServiceCtrlHandlerExW, StartServiceCtrlDispatcherW, OpenProcessToken, RegOpenKeyW, RegCreateKeyExW, RegDeleteKeyW, CloseServiceHandle, InitiateShutdownW, LookupPrivilegeValueW, AdjustTokenPrivileges, ChangeServiceConfigW, QueryServiceConfigW, OpenSCManagerW, OpenServiceW, RegQueryValueExW, RegEnumValueW, TraceMessage, GetTraceEnableFlags, GetTraceEnableLevel, GetTraceLoggerHandle, RegisterTraceGuidsW, UnregisterTraceGuids, CreateRestrictedToken, ConvertStringSidToSidW, CreateProcessAsUserW, RegSetValueExW, FreeSid, CheckTokenMembership, AllocateAndInitializeSid, OpenThreadToken, ImpersonateSelf, RevertToSelf, I_ScRegisterPreshutdownRestart

kernel32.dll

LoadLibraryW, GetSystemDirectoryW, GetTickCount, QueryPerformanceCounter, CreateDirectoryW, ExpandEnvironmentStringsW, GetFullPathNameW, GetFileAttributesExW, GetProcAddress, GetFileAttributesW, GetVersionExW, lstrlenW, GetEnvironmentVariableW, GetSystemTime, MoveFileExW, GetWindowsDirectoryW, CreateProcessW, CreateFileW, SetFileTime, GetExitCodeProcess, FindFirstFileW, CompareFileTime, FindNextFileW, DeleteFileW, FindClose, OutputDebugStringA, UnhandledExceptionFilter, TerminateProcess, GetModuleHandleA, SetUnhandledExceptionFilter, InterlockedCompareExchange, Sleep, GetSystemTimeAsFileTime, GetCurrentProcessId, FreeLibrary, GetCurrentProcess, GetModuleFileNameW, InterlockedDecrement, InterlockedIncrement, LeaveCriticalSection, TryEnterCriticalSection, EnterCriticalSection, InitializeCriticalSection, lstrcmpW, ExitProcess, HeapSetInformation, CreateEventW, GetLastError, CreateThread, WaitForMultipleObjects, TerminateThread, WaitForSingleObject, GetExitCodeThread, CloseHandle, SetEvent, InterlockedExchange, GetCurrentThreadId, LocalFree, GetCurrentThread, GetTempPathW, DeleteCriticalSection, FileTimeToSystemTime, FileTimeToLocalFileTime

msvcrt.dll

DllMain

ntdll.dll

NtQuerySystemInformation

ole32.dll

CoDisconnectContext, CoRevokeClassObject, CoSuspendClassObjects, CoCreateInstance, CoRegisterClassObject, CoInitializeSecurity, CoInitializeEx, CoGetMalloc, CoUninitialize, CoResumeClassObjects, CoRevertToSelf, CoImpersonateClient, CoGetCallContext, CoGetClassObject, CoGetInterfaceAndReleaseStream, CoMarshalInterThreadInterfaceInStream, CoTaskMemFree

user32.dll

GetSystemMetrics

trustedinstaller.exe

Windows Modules Installer by Microsoft

Remove trustedinstaller.exe

Version:	6.0.6000.16386 (vista_rtm.061101-2205)
MD5:	cd987375605e6f9c3230e99eda9d9c6d
SHA1:	d5d121aee7f3ab42995b3699e7249615098e16aa
SHA256:	e5878004b91b8f193b8a68f76da4484c79ed54537ec2304f500579c1e4145fe3

This is a Windows system installed file with Windows File Protection (WFP) enabled.

What is trustedinstaller.exe?

The Windows Modules Installer (trusted Installer) enables installation, modification, and removal of Windows updates and optional components.

Overview

trustedinstaller.exe runs as a service under the name Instalador de Módulos do Windows (TrustedInstaller) with extensive SYSTEM privileges (full administrator access). This version is designed to run on Windows Vista and is compiled as a 32 bit program.

Details

File name:	trustedinstaller.exe
Publisher:	Microsoft Corporation
Product name:	Windows Modules Installer
Description:	Microsoft® Windows® Operating System
Typical file path:	C:\windows\servicing\trustedinstaller.exe
Original name:	TrustedInstaller.exe.mui
File version:	6.0.6000.16386 (vista_rtm.061101-2205)
Product version:	6.0.6000.16386
Size:	25.5 KB (26,112 bytes)
Digital DNA
PE subsystem:	Windows GUI
Entropy:	6.353177
File packed:	No
Code language:	Microsoft Visual C++
.NET CLR:	No

More details

Behaviors

Services

Runs under 'SYSTEM\CurrentControlSet\Services' by the Service Controller (services.exe)

'TrustedInstaller'

Resource utilization

(Note: statistics below are averages based on a minimum sample size of 200 unique participants)

Averages

CPU
Total CPU:	0.41734565%	0.028634%
Kernel CPU:	0.19599855%	0.013761%
User CPU:	0.22134709%	0.014873%
Kernel CPU time:	2,434 ms/min	100,923,805ms/min
User CPU time:	1,740 ms/min	0 ms/min
Memory
Private memory:	15.51 MB	21.59 MB
Private (maximum):	18.24 MB
Private (minimum):	18.24 MB
Non-paged memory:	15.51 MB	21.59 MB
Virtual memory:	72.99 MB	140.96 MB
Virtual memory (peak):	76.18 MB	169.69 MB
Working set:	18.24 MB	18.61 MB
Working set (peak):	18.41 MB	37.95 MB
Page faults:	15,191/min	2,039/min
I/O
I/O read transfer:	467.39 KB/sec	1.02 MB/min
I/O read operations:	78/sec	343/min
I/O write transfer:	459 Bytes/sec	274.99 KB/min
I/O write operations:	3/sec	227/min
I/O other transfer:	14.31 KB/sec	448.09 KB/min
I/O other operations:	1,494/sec	1,671/min
Resource allocations
Threads:	4	12
Handles:	214	600

Process properties

Platform:	32-bit
Command line:	C:\windows\servicing\trustedinstaller.exe
Owner:	SYSTEM
Windows Service
Service name:	TrustedInstaller
Display name:	Instalador de Módulos do Windows
Description:	“Proporciona instalação, modificação e remoção de atualizações e de componentes opcionais do Windows. Se esse serviço for desativado, a instalação e desinstalação de atualizações do Windows podem falhar no computador.”
Type:	Win32OwnProcess
Parent process:	services.exe (Services and Controller app by Microsoft)

Distribution by Windows OS

OS version	distribution
Windows 7 Home Premium	34.50%
Windows 8.1	17.50%
Windows 7 Ultimate	13.50%
Windows 8.1 Pro	7.50%
Windows 7 Professional	6.00%
Windows 8	3.50%
Windows 8.1 Single Language	3.50%
Windows 8 Pro	3.50%
Windows 8.1 Pro with Media Center	2.50%
Windows 8 Single Language	2.50%
Windows 7 Home Basic	2.00%
Windows 8 Enterprise N	1.00%
Windows 8.1 N	0.50%
Windows Seven Black Edition	0.50%
Windows 8.1 Enterprise Evaluation	0.50%
Windows Vista Home Premium	0.50%
Windows 8 Enterprise	0.50%

Distribution by country

United States installs about 43.72% of Windows Modules Installer.

Distribution by PC manufacturer

PC Manufacturer	distribution
ASUS	19.85%
Dell	17.56%
Hewlett-Packard	17.18%
Acer	12.98%
Toshiba	11.45%
Lenovo	8.40%
Sony	5.34%
Intel	3.05%
Samsung	1.53%
GIGABYTE	1.53%
Alienware	1.15%

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