How to Fix the BSOD STOP: c0000018 {Conflicting Address Range} error.

Last updated on October 6th, 2015

A few days ago, I faced the following BSOD problem at Windows (7) boot process:"STOP: c0000018 {Conflicting Address Range}. The specified address range conflict with the address space".  The problem occurred while restarting my computer in order to install the latest Windows Updates.

After doing some research, I find out that the "C0000018" error occurs after the installation of Windows update KB3045999, usually on x64-based versions of Windows 7 or Server 2008 R2, with a McAfee product (e.g. McAfee Data Loss Protection) or a Comodo product (e.g. Comodo Antivirus, Comodo Firewall, etc.) installed on the computer.

In this article you can find detailed instructions on how to fix the following errors:

  • BSOD error: STOP: c0000018 {Conflicting Address Range}. The specified address range conflict with the address space.
  • The application was unable to start correctly (0xc0000018). Click OK to close the application.

fix stop c0000018 bsod


How to fix BSOD C0000018 (0xc0000018) – {Conflicting Address Range} error.

Step 1. Boot Windows in Safe Mode.

Start your computer in Safe mode. To do that:

Windows 7, Vista & XP users:

  1. Close all programs and reboot your computer.
  2. Press the "F8" key as your computer is booting up, before the appearance of the Windows logo.
  3. When the "Windows Advanced Options Menu" appears on your screen, use your keyboard arrow keys to highlight the “Safe Mode” option and then press "ENTER".

safe-mode boot


Step 2. Uninstall the KB3045999 Update.

1. Press Windows + R keys to load the Run dialog box.

2. Type the following command to open Windows Update and press Enter.

  • wuapp.exe

open Windows Update

3. Click at Installed Updates link on the left pane.

view installed updates

4. Select the KB3045999 Update and click Uninstall.

uninstall Windows Update KB3035583

5. Then go back and Check for Updates.

check for updates

6. Choose the Important Updates link.

important updates

7. Right-click at Update KB3045999 and select Hide update.

hide Windows update


8. Press OK and restart you computer normally.

Normally, Windows will now boot without problems, If you still face the C0000018 BSOD error, then proceed to the next step and uninstall the security software that causes the problem.


Step 3. Uninstall the Security Software.

Uninstall and then re-install the latest version of your security software.

1. Boot your computer in Safe Mode again.

2. Then uninstall the security software you have installed on your computer. To do this, go to:

  • Windows 8/7/Vista: Start > Control Panel.
  • Windows XP: Start > Settings > Control Panel


2. Double click to open

  • Add or Remove Programs if you have Windows XP
  • Programs and Features if you have Windows 8, 7 or Vista.


3. From the programs list, select the security software you have installed (Comodo, McAfee, etc.) and click “Uninstall”.


4. Ask “Yes” to UAC warning message (if it appears) to continue.


5. Follow the on screen instruction to completely remove the security software and then restart your computer.

6. After the restart, re-install the latest version of the security software that you previously uninstalled.

You 're done!

If this article was useful for you, please consider supporting us by making a donation. Even $1 can a make a huge difference for us in our effort to continue to help others while keeping this site free: