Should I block it?

No, this file is 100% safe to run.

Additional versions

7.9.9600.17093 (winblue_gdr.140410-1503)	3.70%
7.9.9600.17092 (winblue_gdr.140408-1543)	3.70%
7.9.9431.198 (winmain_bluemp_gdr.130815-1919)	3.70%
7.8.9200.16731 (win8_gdr.131004-1506)	7.41%
7.8.9200.16693 (win8_gdr.130815-1505)	7.41%
7.8.9200.16604 (win8_gdr.130503-1646)	3.70%
7.8.9200.16465 (win8_gdr.121126-1503)	7.41%
7.5.7601.17514 (win7sp1_rtm.101119-1850)	11.11%
7.5.7601.17514 (win7sp1_rtm.101119-1850)	7.41%
7.3.7600.16385 (win7_rtm.090713-1255)	29.63%
7.0.6000.381 (winmain(wmbla).070730-1740)	7.41%
6.0.6000.16386 (vista_rtm.061101-2205)	7.41%

Relationships

Parent process

svchost.exe (Host Process for Windows Services by Microsoft Corporation)

Related files

PE file structure

Show functions

Import table

advapi32.dll

AllocateAndInitializeSid, FreeSid, GetTokenInformation, DuplicateTokenEx, CheckTokenMembership, IsValidSid, CopySid, RegCreateKeyExW, RegSetValueExW, RegQueryValueExW, RegEnumValueW, RegDeleteValueW, GetUserNameW, GetLengthSid, InitializeAcl, AddAccessAllowedAce, InitializeSecurityDescriptor, SetSecurityDescriptorDacl, RegOpenKeyExW, RegCloseKey

api-ms-win-core-com-l1-1-0.dll

CoTaskMemFree, CoInitializeEx, IIDFromString, CoUninitialize, CoCreateInstance

api-ms-win-core-com-l1-1-1.dll

CoTaskMemFree, CoInitializeEx, IIDFromString, CoCreateInstance, CoUninitialize

api-ms-win-core-debug-l1-1-1.dll

OutputDebugStringW

api-ms-win-core-errorhandling-l1-1-1.dll

GetLastError, SetLastError, UnhandledExceptionFilter, SetUnhandledExceptionFilter

api-ms-win-core-file-l1-2-0.dll

GetDriveTypeW, GetVolumePathNameW, GetFileType, SetFilePointer, FlushFileBuffers, GetFileSize, WriteFile, GetFileAttributesW, CreateFileW, CreateDirectoryW, ReadFile, SetEndOfFile

api-ms-win-core-file-l1-2-1.dll

GetFileType, GetDriveTypeW, GetVolumePathNameW, FlushFileBuffers, WriteFile, SetFilePointer, GetFileSize, CreateDirectoryW, CreateFileW, ReadFile, GetFileAttributesW, SetEndOfFile

api-ms-win-core-handle-l1-1-0.dll

CloseHandle

api-ms-win-core-heap-l1-2-0.dll

HeapAlloc, HeapSetInformation, HeapFree, GetProcessHeap

api-ms-win-core-interlocked-l1-2-0.dll

InterlockedExchange, InterlockedIncrement, InterlockedDecrement, InterlockedCompareExchange

api-ms-win-core-libraryloader-l1-1-1.dll

GetModuleFileNameW, GetProcAddress, GetModuleHandleW, FreeLibrary, GetModuleHandleA, LoadLibraryExW

api-ms-win-core-processenvironment-l1-2-0.dll

ExpandEnvironmentStringsW, GetCommandLineW

api-ms-win-core-processthreads-l1-1-1.dll

GetCurrentProcess, GetCurrentThreadId, GetCurrentProcessId, GetStartupInfoW, TerminateProcess

api-ms-win-core-processthreads-l1-1-2.dll

GetCurrentProcess, GetCurrentThreadId, GetCurrentProcessId, TerminateProcess, GetStartupInfoW

api-ms-win-core-profile-l1-1-0.dll

QueryPerformanceCounter

api-ms-win-core-registry-l1-1-0.dll

RegCloseKey, RegQueryValueExW, RegOpenKeyExW, RegEnumValueW, RegDeleteValueW, RegCreateKeyExW, RegSetValueExW

api-ms-win-core-string-l1-1-0.dll

CompareStringW, WideCharToMultiByte

api-ms-win-core-synch-l1-2-0.dll

Sleep, CreateMutexW, ReleaseMutex, WaitForSingleObject

api-ms-win-core-sysinfo-l1-2-0.dll

GetSystemTimeAsFileTime, GetSystemTime, GetTickCount

api-ms-win-core-sysinfo-l1-2-1.dll

GetSystemTime, GetSystemTimeAsFileTime, GetTickCount

api-ms-win-core-timezone-l1-1-0.dll

GetTimeZoneInformation, SystemTimeToTzSpecificLocalTime

api-ms-win-security-base-l1-2-0.dll

CheckTokenMembership, SetSecurityDescriptorDacl, InitializeSecurityDescriptor, AllocateAndInitializeSid, AddAccessAllowedAce, InitializeAcl, GetLengthSid, IsValidSid, FreeSid, CopySid

kernel32.dll

CreateFileW, CreateDirectoryW, GetFileAttributesW, ExpandEnvironmentStringsW, lstrlenW, CreateProcessW, VerSetConditionMask, VerifyVersionInfoW, OutputDebugStringW, WideCharToMultiByte, WriteFile, FlushFileBuffers, GetModuleFileNameW, InterlockedIncrement, InterlockedDecrement, GetSystemTime, GetLastError, SetLastError, GetFileSize, CreateFileMappingW, MapViewOfFile, UnmapViewOfFile, SetFilePointer, SetEndOfFile, ReleaseMutex, WaitForSingleObject, CreateMutexW, CloseHandle, UnhandledExceptionFilter, GetCurrentProcess, TerminateProcess, GetSystemTimeAsFileTime, GetCurrentProcessId, GetCurrentThreadId, GetTickCount, QueryPerformanceCounter, GetModuleHandleA, SetUnhandledExceptionFilter, GetStartupInfoW, Sleep, InterlockedExchange, GetTimeZoneInformation, SystemTimeToTzSpecificLocalTime, GetSystemDirectoryW, LoadLibraryExW, GetDriveTypeW, GetVolumePathNameW, GetFileType, GetSystemInfo, GetModuleHandleW, CompareStringW, GetProcessHeap, HeapFree, HeapAlloc, GetCommandLineW, FreeLibrary, LoadLibraryW, InterlockedCompareExchange, OpenEventW, GetProcAddress

msvcrt.dll

DllMain

ntdll.dll

RtlUnwind, WinSqmIncrementDWORD

ole32.dll

CoTaskMemFree, CoUninitialize, CoCreateInstance, CoInitialize, CoInitializeEx

shlwapi.dll

StrRChrW, StrChrW, PathIsRelativeW, PathIsUNCW, PathStripToRootW, PathIsRootW

sspicli.dll

GetUserNameExW

user32.dll

IsWindow, PostMessageW

wuauclt.exe

Windows Update by Microsoft Corporation (Signed)

Remove wuauclt.exe

Version:	6.0.6000.16386 (vista_rtm.061101-2205)
MD5:	ff81090b6ef1a42a19df226632711d25
SHA1:	f6eda118e4c169c4728cf146d340df08c1437285
SHA256:	5a1774e1c1dd5c7d515c5236366279b76f9fd504d21fe13142bd63e53f88c4dd

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

What is wuauclt.exe?

Windows Update is a service provided by Microsoft that provides updates for the Microsoft Windows operating system and its installed components, including Internet Explorer. Windows Update can be configured to install critical updates automatically so long as the computer is connected to the Internet, without the user needing to install them manually, or even be aware that an update is required.

About wuauclt.exe (from Microsoft Corporation)

“When you turn on automatic updating, most updates will download and install without you having to lift a finger. But sometimes Windows Update will need your input during an installation. In this case,”

Details

File name:	wuauclt.exe
Publisher:	Microsoft Corporation
Product name:	Windows Update
Description:	Microsoft® Windows® Operating System
Typical file path:	C:\Windows\System32\wuauclt.exe
File version:	6.0.6000.16386 (vista_rtm.061101-2205)
Product version:	6.0.6000.16386
Size:	40.5 KB (41,472 bytes)
Certificate
Issued to:	Microsoft Corporation
Authority (CA):	Microsoft Corporation
Expiration date:	Tuesday, July 9, 2013
Digital DNA
Entropy:	5.852595
File packed:	No
Code language:	Microsoft Visual C++
.NET CLR:	No

More details

Resource utilization

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

Averages

CPU
Total CPU:	0.00135172%	0.028634%
Kernel CPU:	0.00113624%	0.013761%
User CPU:	0.00021549%	0.014873%
Kernel CPU time:	156 ms/min	100,923,805ms/min
CPU cycles:	31,833/sec	17,470,203/sec
Memory
Private memory:	2.74 MB	21.59 MB
Private (maximum):	5.48 MB
Private (minimum):	108 KB
Non-paged memory:	2.74 MB	21.59 MB
Virtual memory:	45.86 MB	140.96 MB
Virtual memory (peak):	61.2 MB	169.69 MB
Working set:	246 KB	18.61 MB
Working set (peak):	5.59 MB	37.95 MB
Page faults:	3,489/min	2,039/min
I/O
I/O read transfer:	132 Bytes/sec	1.02 MB/min
I/O read operations:	1/sec	343/min
I/O write transfer:	4 Bytes/sec	274.99 KB/min
I/O write operations:	1/sec	227/min
I/O other transfer:	118 Bytes/sec	448.09 KB/min
I/O other operations:	23/sec	1,671/min
Resource allocations
Threads:	2	12
Handles:	192	600
GUI GDI count:	12	103
GUI USER count:	6	49

Process properties

Integrety level:	Medium
Platform:	32-bit
Command line:	"C:\Windows\System32\wuauclt.exe"
Owner:	User
Parent process:	svchost.exe (Host Process for Windows Services by Microsoft Corporation)

Distribution by Windows OS

OS version	distribution
Windows 7 Ultimate	47.83%
Windows 8	17.39%
Windows 8 Pro	8.70%
Windows 7 Home Premium	8.70%
Windows 8.1 Pro with Media Center	4.35%
Windows 8 Single Language	4.35%
Windows 8.1	4.35%
Windows 8.1 Pro Preview	4.35%

Distribution by country

United States installs about 53.85% of Windows Update.

Distribution by PC manufacturer

PC Manufacturer	distribution
ASUS	26.67%
Lenovo	26.67%
Hewlett-Packard	20.00%
Toshiba	13.33%
Acer	13.33%

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