Issue: Bitdefender Installation Blocked by User Account Control (UAC)
Due to recent changes in the Bitdefender security software, attempting to install Bitdefender on Windows using an outdated installation kit may result in an error. Specifically, User Account Control (UAC) may block the Bitdefender installer, preventing the installation from proceeding.
When this occurs, you may see the following message on your screen:
This app has been blocked for your protection.
An administrator has blocked you from running this app. For more information, contact the administrator.
Cause
This issue is caused by older Bitdefender installation kits that are no longer compatible with the latest security protocols enforced by the software. UAC detects these kits as potentially unsafe and blocks them.
Solution
To resolve this issue, you need to install Bitdefender using the latest version of the installation kit, which can be downloaded directly from your Bitdefender Central account.
Follow the steps outlined in this article to download and install the updated version: How to Install Your Bitdefender Security Solution on Windows.