Error Code 4003 (0xFA3) Fix – How to Get Rid of Error Code 4003 (0xFA3) Messages?

Running into obscure system error pops-up along with Error Code 4003 (0xFA3)? Unable to avoid the unpredictable system shutdown coming with Error Code 4003 (0xFA3)? Cannot get rid of the Blue Screen of Death issues along with Error Code 4003 (0xFA3)? If so, it is suggested to go on reading the article below for it is going to guide you to safely fix Error Code 4003 (0xFA3) and its related system problems.


More Information About Error Code 4003 (0xFA3)

Error Code 4003 (0xFA3) is usually considered to be a critical system error for it is found to be closely associated with essential system services. Inaccurate changes over certain system services can possibly result in Error Code 4003 (0xFA3) and its related system problems. To efficiently avoid this error, it is suggested to be aware of any modification on the essential parts of the system.

What Causes Error Code 4003 (0xFA3)?

  • Incorrect changes over the settings of certain system services
  • Missing or damaged system files
  • Essential parts of system services being unnoticeably removed
  • Missing or corrupted driver files
  • System function being overwritten by mischievous cyber threats
  • Overloaded Windows registry being filled with corrupted or damaged registry keys
  • Network settings being improperly changed
  • Incompatible driver files being downloaded and installed on the system
  • Hardware malfunction

Disastrous System Problems Triggered by Error Code 4003 (0xFA3)

  • Considerably large amounts of CPU resources being used
  • Drastically decelerated system performance
  • Unauthorized processes being found on Windows Task Manager
  • Cannot terminate certain services on Windows Task Manager
  • Unable to copy and paste documents
  • Cannot create new legitimate network connection on the system
  • Running Internet connection being constantly interrupted
  • Inexplicable loss of network bandwidth
  • Unauthorized network connection being created by malicious software at the background of the system
  • Suspicious drive-by downloads being found on the local disk
  • Irreversible modification over essential parts of the system
  • Long time for the system complete a simple task
  • Real-time feature of Windows Internet Security services being disabled silently
  • Running third-party program being intercepted


How to Efficiently Repair Error Code 4003 (0xFA3)?

Manual Repair Guide for Error Code 4003 (0xFA3)

Step One: Turn on Windows Internet Security services to prevent the system from being modified by cyber hackers.

Manually Turn On Windows Defender

For Windows 7 Users

  • Click Start, and then go to Control Panel.
  • Navigate to Action Center under Control Panel.


  • Under Action Center, click on “Turn on now” to enable Windows Defender.


  • After that, the Windows Defender will display on the screen.
  • Click on Update button to update the database of Windows Defender to the latest version.

For Windows 8 Users

  • On the desktop, right click on the bottom left corner and then select Control Panel.
  • Under Control Panel, click to enter System and Security.


  • From the right pane, click to run Action Center.


  • Under the Action Center, from Security section, click Turn on now button of Spyware and unwanted software protection (Important) and Virus protection (Important).
  • Click on Update button to update the database of Windows Defender to the latest version.
  • Under Settings, make sure to select Turn on real-time protection(recommended).

For Windows 10 Users

  • Right click the right left corner of the bottom, click on Settings.
  • Under Settings section, click to open up Update & Security.
  • Under Update & Security, navigate to Windows Defender.
  • Press the “On/Off” button to On under “Real-time Protection” section, “Automatic sample submission” section and “Cloud-based Protection”.


Step Two: Run Find and fix problems utility.

  • Click Start, type Control Panel on the dialog box, click to run Control Panel.


  • Under Control Panel, from System and Security, click to run Find and fix problems.


  • Under System and Security, click to Run maintenance task.


  • Click Next to run the maintenance scan.


  • If you wish to quit the scan, you could click Cancel.


  • Click Close to confirm the test once the scan completes.


Step Three: Repair registry problems.

The Windows registry is one of the crucial parts of Windows operating system. It is originally designed to store settings and configuration information of low-level system services and third-party programs, which play important roles in system operation. The manual repair process of Windows registry requires the user to have enough computer experience to safely deal with the deep side of the system. Any mistakes occur during the process can possibly generate irreparable problems on the system, such as unexpected system error messages, Blue Screen of Death errors, system start-up failure, uncontrollable system restart, frequent system freezes as well as cyber threats’ invasion. To safely get rid of the registry problems, it is suggested to install a trust-worthy and award-winning registry maintenance utility on the system.


John McDowell Windows Certified Expert

John McDowell is an professional computer engineer who currently running his own computer company. He has over 12 years computer experience and would like to share his personal tips and knowledge about computer maintenance and problem troubleshooting to anybody who needs it.

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