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 Bitdefender installation which was not removed properly or by another security solution still present on the system.
 
This is how you may address each situation:
 
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. To find out how to do this, please refer to “How do I restart in Safe Mode?”.
2. Remove Bitdefender from your system:
 
  • In Windows XP:
a) Click Start, go to Control Panel and double-click Add / Remove programs.
b) Find Bitdefender Total Security 2015 and select Remove.
c) Click Remove in the window that appears and then select I want to reinstall it.
d) Click Next to continue.
e) Uncheck the Install Bitdefender 60-Second Virus Scanner option and click Next.
f) Wait for the uninstall process to complete.
g) Reboot your system in normal mode.
 
  • In Windows Vista and Windows 7:
a) Click Start, go to Control Panel and double-click Programs and Features.
b) Find Bitdefender Total Security 2015 and select Uninstall.
c) Click Remove in the window that appears and then select I want to reinstall it.
d) Click Next to continue.
e) Uncheck the Install Bitdefender 60-Second Virus Scanner option and click Next.
f) Wait for the uninstall process to complete.
g) Reboot your system in normal mode.
 
  • In Windows 8:
a) From the Windows Start screen, locate Control Panel (for example, you can start typing "Control Panel" directly in the Start screen) and then click its icon.
b) Click Uninstall a program or Programs and Features.
c) Find Bitdefender Total Security 2015 and select Uninstall.
d) Click Remove in the window that appears and then select I want to reinstall it.
e) Click Next to continue.
f)  Uncheck the Install Bitdefender 60-Second Virus Scanner option and click Next.
g) Wait for the uninstall process to complete.
h) Reboot your system in normal mode.
 
3. Reinstall your Bitdefender product.
 
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. To find out how to do this, please refer to our article How do I restart in Safe Mode?.
2. Remove the other security solution from your system:
 
  • In Windows XP:
a) Click Start, go to Control Panel and double-click Add / Remove programs.
b) Wait a few moments until the list of installed software is displayed.
c) Find the name of the program you want to remove and select Remove.
d) Wait for the uninstall process to complete and then reboot your system.
 
  • In Windows Vista and Windows 7:
a) Click Start, go to Control Panel and double-click Programs and Features
b) Wait a few moments until the list of installed software is displayed.
c) Find the name of the program you want to remove and select Remove.
d) Wait for the uninstall process to complete and then reboot your system.
 
  • In Windows 8:
a) From the Windows Start screen, locate Control Panel (for example, you can start typing "Control Panel" directly in the Start screen) and then click its icon.
b) Click Uninstall a program or Programs and Features.
c) Wait a few moments until the list of installed software is displayed.
d) Find the name of the program you want to remove and select Remove.
e) Wait for the uninstall process to complete and then reboot your system.
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. 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. To find out how to do this, please refer to our article How do I restart in Safe Mode?.
2. Use the System Restore option from Windows to restore the computer to an earlier date before installing the Bitdefender product. To find out how to do this, please refer to How do I use System Restore in Windows?.
3. Reboot the system in normal mode and contact our support
 

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