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.
The process known as Spooler SubSystem App or mIRC or xx or Microsoft® Windows® Operating System or Spoolersubsystem-Anwendung or SU Modded By Booster2ooo or Input Director or Print Spooler
belongs to software Microsoft Windows Operating System or mIRC or xx or Input Director or Betriebssystem Microsoft Windows or CE-Boo-SU
by Microsoft (www.microsoft.com) or mIRC Co. (www.mirc.com) or xx or ClassicsExperience or Microsoft Windows Operating System (windows.microsoft.com).
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 (77% of all occurrences), 58,880 bytes and 33 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
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?
If spoolsv.exe is located in a subfolder of the user's profile folder, the security rating is 71% dangerous. The file size is 81,920 bytes (19% of all occurrences), 86,016 bytes and 13 more variants. The software has no file description. The file is not a Windows core file. The program has no visible window. The program starts upon Windows startup (see Registry key: MACHINE\Run, win.ini, Run, Winlogon\Shell, RunOnce, MACHINE\RunOnce, Userinit, DEFAULT\Run). Spoolsv.exe is able to monitor applications.
If spoolsv.exe is located in a subfolder of C:\Windows, the security rating is 51% dangerous. The file size is 1,790,464 bytes (47% of all occurrences), 1,082,329 bytes and 9 more variants. It is a file with no information about its developer. The spoolsv.exe file is not a Windows system file. The spoolsv.exe file is located in the Windows folder, but it is not a Windows core file. The process starts when Windows starts (see Registry key: MACHINE\Run, win.ini, Run, Winlogon\Shell, RunOnce, MACHINE\RunOnce, Userinit, DEFAULT\Run). Spoolsv.exe is able to record keyboard and mouse inputs, hide itself and monitor applications.
If spoolsv.exe is located in a subfolder of C:\Windows\System32, the security rating is 87% dangerous. The file size is 381,440 bytes (33% of all occurrences), 540,672 bytes and 4 more variants.
If spoolsv.exe is located in the C:\Windows\System32\drivers folder, the security rating is 82% dangerous. The file size is 61,440 bytes (50% of all occurrences), 47,616 bytes, 376,832 bytes or 145,920 bytes.
If spoolsv.exe is located in the C:\Windows folder, the security rating is 74% dangerous. The file size is 5,929,388 bytes (16% of all occurrences), 5,928,038 bytes and 4 more variants.
If spoolsv.exe is located in a subfolder of C:\Windows\System32\drivers, the security rating is 80% dangerous. The file size is 1,790,464 bytes.
If spoolsv.exe is located in a subfolder of "C:\Program Files", the security rating is 64% dangerous. The file size is 1,744,413 bytes (33% of all occurrences), 47,616 bytes or 640,512 bytes.
If spoolsv.exe is located in the Windows folder for temporary files, the security rating is 56% dangerous. The file size is 20,804 bytes.
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.
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 cleanmgr and sfc /scannow, uninstalling programs that you no longer need, checking for Autostart programs (using msconfig) and enabling Windows' Automatic 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 resmon 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 DISM.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: Security 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. Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.