What is spoolsv.exe?

The genuine spoolsv.exe file is a software component of Microsoft Windows Operating System by Microsoft.
Spoolsv.exe is an executable file that runs the Print Spooler Service, a process that caches printing jobs into system memory as images as printers cannot understand fonts or decipher graphics. This process sometimes takes a huge amount of system resources as processing different file formats into an image suitable for printing often takes time and a lot of memory. To clear this memory and stop the process, simply right click on the printer icon in the Taskbar and select, 'Exit'. This is a core Windows process so disabling it from the Task Manager may result in a critical failure causing the system to automatically reboot. Microsoft was founded in 1975 by Bill Gates and Paul Allen and quickly rose to prominence following the launch of their popular operating system, MS-DOS, for early personally computers. Microsoft began developing graphical user interface and the distinguishable Start-button on the introduction on Windows 95. Further additions like networking and security soon followed.

SpoolSv stands for Print Spooler Service

The .exe extension on a filename indicates an executable file. Executable files may, in some cases, harm your computer. Therefore, please read below to decide for yourself whether the spoolsv.exe on your computer is a Trojan that you should remove, or whether it is a file belonging to the Windows operating system or to a trusted application.

Click to Run a Free Scan for spoolsv.exe related errors

Spoolsv.exe file information

Windows Task Manager with spoolsv
Spoolsv.exe process in Windows Task Manager

The process known as Spooler SubSystem App or mIRC or Print Spooler or xx or Microsoft® Windows® Operating System or Spoolersubsystem-Anwendung or SU Modded By Booster2ooo or Input Director

belongs to software Microsoft Windows Operating System or mIRC or xx or Input Director or Betriebssystem Microsoft Windows or CE-Boo-SU

by Microsoft ( or mIRC Co. ( or xx or ClassicsExperience or Microsoft Windows Operating System (

Description: The original spoolsv.exe from Microsoft is an important part of Windows, but often causes problems. The spoolsv.exe file is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 57,856 bytes (75% of all occurrences), 58,880 bytes and 36 more variants. 
The program is not visible. It is a Microsoft signed file. Therefore the technical security rating is 22% dangerous, however you should also read the user reviews.

Recommended: Identify spoolsv.exe related errors

Viruses with the same file name

Is spoolsv.exe a virus? No, it is not. The true spoolsv.exe file is a safe Microsoft Windows system process, called "Spooler SubSystem App". However, writers of malware programs, such as viruses, worms, and Trojans deliberately give their processes the same file name to escape detection. Viruses with the same file name are such as Trojan.Generic.2882490 or Trojan.Generic.8524276 (detected by F-Secure), and Mal/FakeAV-BX (detected by Sophos).
To ensure that no rogue spoolsv.exe is running on your PC, click here to run a Free Malware Scan.

How to recognize suspicious variants?

External information from Paul Collins:
There are different files with the same name:

Important: Some malware disguises itself as spoolsv.exe, particularly when not located in the C:\Windows\System32 folder. Therefore, you should check the spoolsv.exe process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


User Comments

If you do see this on your task manager, it could be two things: 1. It is the valid window process that I have, 2. It is a renamed virus to help confuse you. To verify if it is valid: right click on it and click file location. If it has windows in it, you are safe.
spoolsv.exe is used for printer spooling
  M Shahid Ali  
As of yesterday, this could be the ChewBacca trojan. See the section at the end titled "What to do".
  Tom   (further information)
It is a service that loads a printing job into memory as an image if it isn't an image already, instead of text, so the printer doesn't have to understand fonts or decipher graphics, the solution on windows XP is to go to the notifications area, right click on the icon that looks like a printer, and click exit, that will clear the live cache that can be over 200mb for a 3 page document, I had a 200 page document in queue, it kept my windows XP with 3gb RAM at a halt until I exited the print job, however, don't try to end it by closing "spoolsv" from tskmgr, as it will cause a critical system failure, with a one minute warning until the computer reboots.
  dreamwave development  
if you have an HP printer, this file is needed so you will be able to print. if you kill or delete, you cant print
It depends on your printer. Turn printer off, turn it on ONLY when you wanna use it. And the problem is gone
A printer spooling system that sometimes takes a strange amount of CPU and memory. If you don't printing anything, I suggest ending the process. However deleting the file itself can be extremely dangerous.
  Grandmaster Quy  
it is system friendly file if no one mess with it and required to print the document in background, no need to worry.
  Asif Ahmed  
More comments can be found here:
    (further information)

Rating chart

Summary: Average user rating of spoolsv.exe: based on 692 votes with 9 reviews. 318 users think spoolsv.exe is essential for Windows or an installed application. 41 users think it's probably harmless. 148 users think it's neither essential nor dangerous. 63 users suspect danger. 122 users think spoolsv.exe is dangerous and recommend removing it. 72 users don't grade spoolsv.exe ("not sure about it").

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Best practices for resolving spoolsv issues

A clean and tidy computer is the key requirement for avoiding problems with spoolsv. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the 6resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the spoolsv.exe process on your computer, the following programs have proven to be helpful: ASecurity Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

spoolsv.exe [all]