Bitdefender is an excellent antivirus software to protect your device against potential malware threats. But sometimes, errors can happen during the software update. If you end up with Bitdefender error 100 during the update, we will help you resolve it. This error code is an isolated error that occurs due to several factors. Keep reading the instructions below to know how to fix the Bitdefender antivirus error code 100.

Solution 1: Update Bitdefender offline
Step 1:First, get the Virus Definition update and scan engine updates by downloading the weekly.exe package from the official Bitdefender site while you have the Internet connection on your computer.
Step 2:Next, save the downloaded package on your computer.
Step 3:To start the offline update, double-click the downloaded file. This will start the setup wizard.
Step 4:Click Next to start the installation.
Step 5:Agree to the License Agreement by clicking the I accept button.