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

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:	6.3.9600.16384 (winblue_rtm.130821-1623)
MD5:	da56ffa46030e6feb215e3d5daa65b11
SHA1:	0de5df021187d42b65053daa7f4550f22c2dbcbf

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). and is compiled as a 64 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:	6.3.9600.16384 (winblue_rtm.130821-1623)
Product version:	6.3.9600.16384
Size:	96.5 KB (98,816 bytes)
Build date:	8/22/2013 5:49 AM
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:	0.01803092%	0.028634%
Kernel CPU:	0.00460344%	0.013761%
User CPU:	0.01342748%	0.014873%
Kernel CPU time:	18,598 ms/min	100,923,805ms/min
Context switches:	57/sec	284/sec
Memory
Private memory:	1.94 MB	21.59 MB
Private (maximum):	7.76 MB
Private (minimum):	5.04 MB
Non-paged memory:	1.94 MB	21.59 MB
Virtual memory:	29.92 MB	140.96 MB
Virtual memory (peak):	68.98 MB	169.69 MB
Working set:	5.16 MB	18.61 MB
Working set (peak):	42.08 MB	37.95 MB
Resource allocations
Threads:	4	12
Handles:	103	600

Process properties

Integrety level:	System
Platform:	64-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

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