My system doesn't boot up after installing Bitdefender

If you just installed Bitdefender and cannot reboot your system in normal mode anymore there may be various reasons for this issue.

Most probably this is caused by a previous security solution which was not removed properly or by another Bitdefender installation still present on the system.

This is how you may address each situation:

  • You had a different security solution before and you did not remove it properly.

    To solve this, follow these steps:

    1. Reboot your system and enter in Safe Mode with Networking.


    2. In order to correctly uninstall the other software, go to their website and run their uninstall tool or contact them directly in order to provide you with the uninstall guidelines.

    3. Remove Bitdefender from your system:

      1. Go to http://www.bitdefender.com/uninstall and download the uninstall tool on your computer.

      2. Run the uninstall tool using administrator privileges.

      3. Restart your computer.

    4. If you cannot access the Internet while in Safe Mode, follow these steps:

      To remove Bitdefender, follow the path from the Windows start menu: Start → All Programs → Bitdefender 2012 → Repair or Remove.

      Select Remove - to remove all installed components.

    5. Reboot your system in normal mode and reinstall Bitdefender.

  • You had Bitdefender before and you did not remove it properly.

    To solve this, follow these steps:

    1. Reboot your system and enter in Safe Mode with Networking.


    2. Remove Bitdefender from your system:

      1. Go to http://www.bitdefender.com/uninstall and download the uninstall tool on your computer.

      2. Run the uninstall tool using administrator privileges.

      3. Restart your computer.

    3. If you cannot access the Internet while in Safe Mode, follow these steps:

      To remove Bitdefender, follow the path from the Windows start menu: Start → All Programs → Bitdefender 2012 → Repair or Remove.

      Select Remove - to remove all installed components.

    4. Reboot your system in normal mode and reinstall Bitdefender.

You have already followed the steps above and the situation is not solved.

To solve this, follow these steps:

  1. Reboot your system and enter in Safe Mode.


  2. Use the System Restore option from Windows to restore the computer to an earlier date before installing the Bitdefender product. 

  3. Reboot the system in normal mode and contact our support representatives for help.


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