HOW TO FIX BITDEFENDER ERROR 100

What is Bitdefender Error 100? Well, it’s an errorthat arises when the update doesn’t get downloaded or installed properly. The most probable reason for that may be the Windows Defender Firewall that might be interfering with the functioning of theBitdefenderthereby creating issues in the automatic update process of the Bitdefender security setup. In case, your system is showing the same error you can go through the various troubleshooting methods we have listed later in this article. You could prefer disabling the Firewall for a temporary duration, take a manual approach download the latest Bitdefender update, or fix the error using the Bitdefender offline installer. With that said, let’s get started with the steps to resolve the issue:

Disable Windows Firewall

The Windows Firewall might become a big interruption in the update process of McAfee. And as a result, you might find your system showingerrors like Bitdefender Error 100. So, you need to disable the Firewall for a temporary duration before you initiate the update process for Bitdefender. You can also add Bitdefender to the whitelisted apps, in case you don’t want to disable the Windows Firewall. With that said, let’s proceed further to the steps to disable the Firewall:

1. Head over to the Windows Defender Firewall by searching for it using the Start menu.
2. Tap on the option “Turn Windows Defender Firewall On or Off” appearing on the leftside panel.
3. Checkmark “Turn off Windows Defender Firewall” under Public as well as Private network settings.
4. If you want to the Bitdefender app to be added to the exclusion list, you need to tap onthe option “Allow an app or program through Windows Defender Firewall,” and follow the settings appearing further.
5. Further tap on the “Change Settings” icon appearing on your screen in the dialog box on the top-left corner of your screen. Further, you need to get administrative privileges to in order to perform the task.
6. Then, scroll below to the setup file related to Bitdefender and checkmark it. In case the file isn’t available on that page, you need to tap on “Allow Another App,” and then locate the Bitdefender file. Once found, you need to add it to the list.

After finishing the procedure, try updating the Bitdefender setup, and by this time the Error Code 100 would get fixed. In case the system is showing the same issue, even after following this procedure, then here’s another approach that you could follow. However, before you proceed further to the next solution, we recommend you to let the first fix remain enabled.

Manual Updating of Bitdefender

Various instances have revealed that updating the Bitdefender antivirus setup manually rectifies aforementioned issue.

1. Initiate the process by tapping on the upward arrow appearing on the taskbar. Doing this will bring the System Tray on your screen.
2. Further, right-tap on icon related to the Bitdefender setup and choose the option “Update Now.”
3. Allow the update process sometime to finish.
4. Once, the installation finishes up, you need to check if the issue has got fixed or not.

Use Bitdefender Offline Installer

To use the Bitdefender offline installer, you need to click on:

1. You can make use of the offline installer till your internet resolves. To accomplish this, you need to get the Bitdefender offline installer for 32-bit OS or 64-bit OSaccordingly. You need to search for the Bitdefender 2018 version by visiting its respective download link.
2. Further, head over to the Bitdefender setup and tap on Next, so as to move further.
3. Now, accept the Terms and Conditions and move ahead by clicking on Next.
4. Now, tap on Install in order to initiatethe process.Once you have installed the setup,click on Finish and furtherlaunch the Bitdefender setup. You won’t see Error Code 100, any further.

That’s it. These were the ways using which you can troubleshoot the Bitdefender Error 100 on your system. Make sure to follow the methods listed in the following order according to their preferences. Furthermore, if you are facing any issues related to the steps, do let us know in the comment section below:

Source: How to Fix Bitdefender Error 100