QuickBooks Error 404 is an HTTP status code that indicates that the page or resource you are trying to access cannot be found. In the context of QuickBooks Error 404 typically occurs when you are trying to update or download payroll updates, or when you are trying to access a web page within QuickBooks.

Here are a few possible causes of QuickBooks Error 404:

Internet connectivity issues: QuickBooks requires a stable and active internet connection to access online features and download updates. If your internet connection is intermittent or unreliable, it can result in Error 404.

Incomplete or interrupted QuickBooks installation: If QuickBooks was not installed properly or the installation process was interrupted, it can lead to Error 404 when trying to access certain online features.

Deleted or damaged QuickBooks files: If essential QuickBooks files have been accidentally deleted or corrupted, it can result in Error 404.

Changes in web page addresses: Sometimes, the URLs or addresses of certain web pages within QuickBooks can change due to updates or other reasons. If QuickBooks is attempting to access an outdated or incorrect URL, it can trigger Error 404.

To resolve QuickBooks Error 404, you can try the following troubleshooting steps:

Verify your internet connection: Ensure that you have a stable and active internet connection. Test your connection by opening other websites in a web browser.

Update QuickBooks: Make sure you have the latest updates for your QuickBooks version. You can go to the "Help" menu and select "Update QuickBooks" to download and install any available updates.

Clear your browser cache: If you are accessing web pages within QuickBooks, clearing your browser cache can help resolve any cached or outdated page information. Open your web browser's settings and clear the browsing history, cache, and cookies.

Repair QuickBooks installation: Use the QuickBooks installation repair tool or perform a clean installation of QuickBooks to fix any installation-related issues.

Check the URL settings in QuickBooks: Verify that the web page addresses or URLs in QuickBooks are correct. If you are unsure, you may need to consult the QuickBooks support documentation or contact Intuit support for assistance.

If the above steps do not resolve the issue, you may need to reach out to QuickBooks support for further assistance. They can provide specific guidance based on your QuickBooks version and configuration.