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What is splwow64.exe?

Part of Thunking Spooler APIS from 32 to 64 Process by Microsoft

(splwow64.exe is a system file that is installed with Windows)
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How does splwow64.exe run?

Process - splwow64.exe is an instance of a running program. This 64-bit program executes with the privileges as the currently logged in user account. splwow64.exe is executed by the process winword.exe (2007 Microsoft Office system by Microsoft).


What is the community is seeing?What is the community is doing?
About 0.6% of all Boost users have the splwow64.exe process running.Of the 0.6% of splwow64.exe users, less than 1% have disabled it.
How stable is Thunking Spooler APIS from 32 to 64 Process?
Based on crash data discovered by Boost, stability is a measure of how sound this particular process and the average percent of times it crashes.
Typical program1.26%
How resource intensive is splwow64.exe?
Comparison based on the average resource utilization across all programs.
0.00013% CPU1328.3%
Average CPU utilization across all programs is 0.00001%.
          3.89 MB RAM18.1%
Average private memory utilization across all programs is 21.53 MB.
 6 /min0.3%
Average I/O read and write operations for all programs is 2,253 per minute.
         7 GDI objects4.7%
Average number of GUI GDI and USER objects for all programs is 150.
Typical file (disk image) location:

What modules are loaded?

A module is a dynamic link library (DLL) or an executable file that is loaded into the process. Below is a list of non-system modules that are loaded by Thunking Spooler APIS from 32 to 64 Process.

What else is related?

Thunking Spooler APIS from 32 to 64 Process Stability

splwow64.exe crashes or has encountered a critical error 0.8900% of the time.
Error: Stopped working (APPCRASH)
Occurred: over 6 months ago

What Windows OS versions does this run on?

Windows Vista (TM) Home Premium (6.0.6002.131072)
Windows Vista (TM) Ultimate (6.0.6002.131072)

About Microsoft Corporation

Microsoft, founded in 1975 by Bill Gates and Paul Allen, is a veteran software company, best known for its Microsoft Windows operating system and the Microsoft More...
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File details

File name: splwow64.exe
Publisher: Microsoft Corporation (verified)
Name: Thunking Spooler APIS from 32 to 64 Process
Description: Microsoft® Windows® Operating System
Version: 6.0.6001.18000 (longhorn_rtm.080118-1840)
Product version: 6.0.6001.18000
Size: 39 KB
Original file name: splwow64.exe
Windows file protection: Yes

Resource utilization

CPU utilization averages
Total CPU: 0.0002893496%
Privileged CPU: 0.0001565206%
User CPU: 0.00013282905556%
Privileged CPU time: 2440.55 ms
Privileged CPU time /min: 1 ms
CPU cycle count: 36,373,165
CPU cycle count /min: 4,300,431
Memory utilization averages
Committed memory: 79.64 MB
Peak committed memory: 92.93 MB
Paged memory: 3.89 MB
Peak paged memory: 10.02 MB
Paged system memory: 145.1 KB
Non-paged system memory: 8.35 KB
Working set memory: 5.32 MB
Peak working set memory: 12.39 MB
Min working set memory: 3.94 MB
Private memory: 3.89 MB
Page faults: 59,141
Page faults /min: 26
Process I/O averages
Total read operations: 13,231
Read operations /min: 5
Total read transfer: 1.33 MB
Read transfer /min: 796 Bytes
Total write operations: 73
Write operations /min: 1
Total write transfer: 2.86 MB
Write transfer /min: 1.63 KB
Total other operations: 33,607
Other operations /min: 16
Total other transfer: 71.42 KB
Other Transfer /min: 43 Bytes
GUI Object Averages
GDI objects: 7
USER objects: 3
Handle count average: 98
Thread count average: 4
Thread resource averages

Process details

Runs as (owner): User
Integrety level: Medium
Windows platform: 64-bit
Parent Process
Process Command

Image hashes

MD5: 3d85663db8a364b5a20ecd588cf4c870
SHA-1: 32792054d072747db11be1ad81e31d60847c75b1
SHA-256: 794b0525e8933ea47c985e9841cf60bd76c5338a81ebb4347179f36bd51bb3ee

PE image details

CLR assembly: Yes
Langauge*: Microsoft Visual C# / Basic .NET
File packed: No
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