What is “Spooler SubSystem App”

Spooler SubSystem App

Managing print jobs in Windows is facilitated by a key component known as the Spooler Subsystem App. However, this app can sometimes cause problems, leading to high CPU usage, or it may stop working entirely.

In this article, we’ll take a closer look at what the Spooler Subsystem App is, explore its impact on CPU performance, discuss how to disable it, and provide solutions for common problems.

Spooler SubSystem App

Understanding the Spooler Subsystem App

The Spooler Subsystem App, also known as spoolsv.exe, is a core component of the Microsoft Windows operating system. It’s responsible for managing print jobs in the print queue and communicating with the printer.

When you print a document, the Spooler Subsystem App stores the print job in memory, freeing up your computer to perform other tasks while the document is printed in the background.

Spooler Subsystem App and High CPU Usage

In some cases, users might notice that the Spooler Subsystem App is causing high CPU usage. This usually happens when there’s a large or complex print job in the queue, a problematic printer driver, or an issue with the printer’s network connection.

To resolve high CPU usage, you can try:

  • Clearing the print queue.
  • Updating or reinstalling your printer drivers.
  • Checking your printer’s network connection.

Disabling the Spooler Subsystem App

While disabling the Spooler Subsystem App can free up resources, be aware that it will prevent you from printing documents. If you still want to proceed, follow these steps:

  1. Press “Windows + R” keys to open the “Run” dialogue box.
  2. Type “services.msc” and press “Enter”.
  3. Scroll down and find “Print Spooler” in the list.
  4. Right-click on “Print Spooler” and select “Properties”.
  5. Under “Startup type”, select “Disabled”.
  6. Click “OK” to save changes.

Resolving “Spooler Subsystem App Has Stopped Working and Was Closed”

This error message often occurs due to corrupt printer drivers or print jobs. Here’s how to fix it:

  1. Restart the Print Spooler service from the services management console (“services.msc”).
  2. Clear the print queue by deleting all files in “C:\Windows\System32\Spool\Printers”.
  3. Update or reinstall your printer drivers.

Troubleshooting “Spooler Subsystem App Encountered a Problem”

If you encounter this error message, it often suggests an issue with your printer’s software or hardware. To troubleshoot:

  1. Try disconnecting and reconnecting your printer.
  2. Clear the print queue as mentioned above.
  3. Update or reinstall your printer drivers.
  4. If all else fails, consider contacting the printer’s manufacturer or a professional technician.


The Spooler Subsystem App is an essential component of Windows, primarily responsible for handling print jobs. Although it can sometimes cause problems such as high CPU usage or error messages, these issues are generally resolvable with a bit of troubleshooting.

Remember, disabling the Spooler Subsystem App should only be a last resort, as it will prevent all print jobs.


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