Should I block it?

No, this file is 100% safe to run.

Additional versions

6.3.9600.17031 (winblue_gdr.140221-1952)	14.29%
6.3.9600.16384 (winblue_rtm.130821-1623)	8.57%
6.3.9431.0 (winmain_bluemp.130615-1214)	2.86%
6.2.9200.16613 (win8_gdr.130515-1513)	17.14%
6.2.9200.16455 (win8_gdr.121109-1506)	42.86%
6.2.9200.16455 (win8_gdr.121109-1506)	2.86%
6.2.9200.16384 (win8_rtm.120725-1247)	8.57%
6.2.8400.0 (winmain_win8rc.120518-1423)	2.86%

Relationships

trustedinstaller.exe (Windows Modules Installer by Microsoft)

PE file structure

Show functions

Import table

advapi32.dll

RegOpenKeyExW, RegCloseKey, RegQueryValueExW, ConvertStringSidToSidW, CheckTokenMembership

kernel32.dll

Sleep, CreateDirectoryW, GetFileAttributesExW, LocalFree, TryEnterCriticalSection, LeaveCriticalSection, EnterCriticalSection, InitializeCriticalSection, GetModuleFileNameW, MoveFileExW, GetSystemTime, GetEnvironmentVariableW, GetWindowsDirectoryW, FindClose, DeleteFileW, FindNextFileW, CompareFileTime, FindFirstFileW, OutputDebugStringA, TerminateProcess, UnhandledExceptionFilter, GetTickCount, GetSystemTimeAsFileTime, GetCurrentThreadId, WaitForSingleObject, ResetEvent, GetCurrentProcess, DuplicateHandle, OpenProcess, DeleteCriticalSection, InterlockedIncrement, InterlockedDecrement, GetSystemDirectoryW, FreeLibrary, GetProcAddress, LoadLibraryW, HeapSetInformation, CreateEventW, CloseHandle, SetEvent, GetLastError, WaitForMultipleObjects, GetCurrentProcessId, InterlockedExchange, InterlockedCompareExchange, SetUnhandledExceptionFilter, GetModuleHandleA, QueryPerformanceCounter

msvcrt.dll

DllMain

ole32.dll

CoSuspendClassObjects, CoUninitialize, CoInitializeSecurity, CoInitializeEx, CoCreateInstance, CoDisconnectContext, CoRevokeClassObject, CoResumeClassObjects, CoRegisterClassObject, CoGetMalloc

TiWorker.exe

Windows Modules Installer Worker by Microsoft

Remove TiWorker.exe

Version:	6.2.9200.16613 (win8_gdr.130515-1513)
MD5:	f6b1c6e075b902d80391e3fda5b4527c
SHA1:	b638fc90d771fc73583b53d197015375518b2110
SHA256:	b4d515e329d1a5f7fb23a1803c1a58d3af8566ae4887ee4f7e5487d9156241e0

Overview

tiworker.exe executes as a process under the SYSTEM account with extensive privileges (the system and the administrator accounts have the same file privileges). The assembly utilizes the .NET run-time framework (which is required to be installed on the PC). This version is installed on Windows 8 and is compiled as a 64 bit program.

Details

File name:	tiworker.exe
Publisher:	Microsoft Corporation
Product name:	Windows Modules Installer Worker
Description:	Microsoft® Windows® Operating System
Typical file path:	C:\windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_6.2.9200.16384_none_622908ad510eb05b\tiworker.exe
File version:	6.2.9200.16613 (win8_gdr.130515-1513)
Product version:	6.2.9200.16613
Size:	185 KB (189,440 bytes)
Build date:	5/16/2013 12:23 AM
Digital DNA
File packed:	No
Code language:	Microsoft Visual C# / Basic .NET
.NET CLR:	Yes
.NET NGENed:	No

More details

Resource utilization

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

Averages

CPU
Total CPU:	0.06423999%	0.028634%
Kernel CPU:	0.02844798%	0.013761%
User CPU:	0.03579202%	0.014873%
Kernel CPU time:	26,751,878 ms/min	100,923,805ms/min
CPU cycles:	14,186,410/sec	17,470,203/sec
Context switches:	214/sec	284/sec
Memory
Private memory:	113.21 MB	21.59 MB
Private (maximum):	127.74 MB
Private (minimum):	26.92 MB
Non-paged memory:	113.21 MB	21.59 MB
Virtual memory:	285.44 MB	140.96 MB
Virtual memory (peak):	387.12 MB	169.69 MB
Working set:	87.04 MB	18.61 MB
Working set (peak):	285.58 MB	37.95 MB
Page faults:	2,519,454/min	2,039/min
I/O
I/O read transfer:	30.87 MB/sec	1.02 MB/min
I/O read operations:	696/sec	343/min
I/O write transfer:	13.86 MB/sec	274.99 KB/min
I/O write operations:	52,718/sec	227/min
I/O other transfer:	422.19 KB/sec	448.09 KB/min
I/O other operations:	3,380/sec	1,671/min
Resource allocations
Threads:	4	12
Handles:	1724	600

Process properties

Integrety level:	System
Platform:	64-bit
Command lines:	C:\windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_6.2.9200.16683_none_62280e15510f8e79\tiworker.exe -embedding C:\windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_6.2.9200.16613_none_6273bd8950d6cae2\tiworker.exe -embedding
Owner:	SYSTEM
Parent process:	svchost.exe (by Microsoft)

Threads

Averages

cbscore.dll
Total CPU:	49.76698082%	0.272967%
Kernel CPU:	9.65525296%	0.107585%
User CPU:	40.11172786%	0.165382%
CPU cycles:	1,034,897,015/sec	5,741,424/sec
Context switches:	403/sec	79/sec
Memory:	1.13 MB	1.16 MB
TiWorker.exe (main module)
Total CPU:	0.02496662%
Kernel CPU:	0.00736725%
User CPU:	0.01759938%
CPU cycles:	586,274/sec
Memory:	200 KB
ntdll.dll
Total CPU:	0.02292489%
Kernel CPU:	0.01146245%
User CPU:	0.01146245%
CPU cycles:	397,850/sec
Memory:	1.75 MB
combase.dll
Total CPU:	0.00000827%
Kernel CPU:	0.00000827%
User CPU:	0.00000000%
CPU cycles:	93/sec
Memory:	1.69 MB

Distribution by Windows OS

OS version	distribution
Windows 8	37.14%
Windows 8 Pro	20.00%
Windows 8.1	14.29%
Windows 8 Pro with Media Center	8.57%
Windows 8.1 Pro with Media Center	2.86%
Windows 8.1 Enterprise	2.86%
Windows 8.1 Pro	2.86%
Windows 8.1 Pro Preview	2.86%
Windows 8 Single Language	2.86%
Windows 8 Enterprise	2.86%
Windows 8 Release Preview	2.86%

Distribution by country

United States installs about 54.29% of Windows Modules Installer Worker.

Distribution by PC manufacturer

PC Manufacturer	distribution
ASUS	25.81%
Toshiba	19.35%
Sony	12.90%
Dell	12.90%
Acer	9.68%
Hewlett-Packard	9.68%
Intel	6.45%
Samsung	3.23%

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