If you’re trying to access your Bitdefender security program but the main interface cannot be displayed, this means that the program was not installed properly. This is probably due to an older kit being used during the installation process.
To fix this issue, here’s what you’ll have to do:
1. Uninstall the Bitdefender security software from the Control Panel
2. Go to Bitdefender Central and log in to your account.
3. Install Bitdefender.