As reported by some Bitdefender users, they continue to receive error 1002 when running the program or during the installation/updating of the Bitdefender software. In this guide on MiniTool Website , there are some possible workarounds to help you fix this error and they all deserve a shot.

What Is Bitdefender Error 1002?

Bitdefender is one of the most popular antivirus programs which provides you with services on email security, cloud anti-virus, anti-spam, and macro protection. However, sometimes it will work abnormally and you will receive some errors like a problem has occurred in the Bitdefender Threat Scanner , failing to connect to the server, and so on. Today, we will discuss one of the common errors – Bitdefender error 1002 for you.

Bitdefender error 1002 refers to a type of update error appearing during Windows startup, shutdown, or program installation process. When you get this error, you may receive the following error messages:

  • Bitdefender Update Failed Error 1002
  • Error in Application: Bitdefender Antivirus Error 1002.
  • Bitdefender Antivirus Error 1002 not found.
  • Sorry for the inconvenience – Bitdefender Antivirus Error 1002 has a problem.
  • ……

After receiving these error messages, your system might become sluggish and the keyboard or mouse input will respond slowly. That must be a very annoying experience. Although it is pretty hard to look for the exact reason for this error, we have endeavoured to find a list of possible reasons behind error 1002 Bitdefender:

  • Slow and unstable internet connection.
  • Infection of malware or viruses.
  • Missing system files.
  • Too many junk files on your disk.
  • Incomplete installation of Bitdefender.
  • Problematic operating system.

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How to Fix Bitdefender Error 1002 on Windows 10/11?

After puzzling out the reasons for Bitdefender error 1002, in this part, we will show you how to remove this error on Windows 10/11 and make your system work properly again. Please try these solutions one by one until Bitdefender gets fixed.

Fix 1: Check Your Internet Connection

Under most circumstances, a weak and unstable internet connection can lead to Bitdefender error 1002. Therefore, check and improve your internet connection to make your internet stable again. Here’s how to do it:

Step 1. Go to SPEEDTEST to check your internet connection. After hitting the GO button, you can check the ping, download speed, upload speed or internet connection bandwidth. If you do have an internet connection issue, move to the next step.

Step 2. Go to Settings > Update & Security > Troubleshoot > Additional troubleshooters .

Step 3. Under Get up and running , choose Internet Connections and tap on Run the troubleshooter to start the internet troubleshooting process.

hit Run the troubleshooter

Other tips to troubleshoot your internet connection:

Fix 2: Scan Your System with Windows Defender

It is very likely that there are some malware or viruses on your system interrupting Bitdefender’s updating process hence contributing to Bitdefender error 1002. Since Bitdefender doesn’t work properly, you can scan your computer for harmful threats with Windows Defender.

Step 1. Click Start and hit the gear icon to open Windows Settings .

Step 2. Scroll down in the settings menu to find Update & Security and hit it.

Step 3. Go to Windows Security > Virus & threat protection > Scan options .

Step 4. In this window, there are four options for you: Quick scan , Full scan , Custom scan , and Microsoft Defender Offline scan . Tick Full scan and hit Scan now to start scanning all the files and running programs on your hard disk. If any threats exist in your system, they will be removed.

hit Scan now

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Fix 3: Run System File Checker

Another possible culprit of Bitdefender error code 1002 is corrupted or missing system files. Fortunately, you can fix it via a Windows inbuilt tool – System File Checker to scan your system thoroughly and repair any corruption in it. Follow the steps below:

Step 1. Press Win + S to open the search bar .

Step 2. Type cmd to locate Command Prompt and right-click on it to choose Run as administrator . If prompted by UAC , hit Yes .

Step 3. In the command window, type sfc /scannow and then tap on Enter on your keyboard. The System File Checker tool will search for corrupted files and repair them automatically for you, so please be patient.

run sfc /scannow

Some of you may encounter sfc /scannow stuck during the system scanning. If you happen to suffer from it, don’t worry! This guide will show some useful solutions for you - Windows 10 SFC /Scannow Stuck at 4/5/30/40/73, etc.? Try 7 Ways .

Fix 4: Run Disk Cleanup

Usually, the accumulated junk files that occupy your disk space can also cause errors like Bitdefender error 1002. As a result, removing these temporary items is a good solution for you.

Step 1. Run Command Prompt as an administrator.

Step 2. Type cleanmgr and hit Enter . Then a dialog box will pop up, you can choose the target drive from the drop-down menu and click on OK .

choose the desired drive

Step 3. Tick the items you want to delete and this tool will begin to delete them to free up your disk space.

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Fix 5: Reinstall Bitdefender

The Bitdefender files might get corrupted due to some reasons. In this case, reinstalling the app might be useful to you.

Step 1. Open your Control Panel and go to Programs > Programs and Features .

hit Programs and Features

Step 2. Now, you can see a list of applications installed on your system. Locate Bitdefender and hit it to choose Uninstall .

Step 3. Hit Uninstall again to confirm this action.

Step 4. After the uninstalling process is complete, go to Bitdefender's official website to download and reinstall the app.

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Fix 6: Check for Updates

You had better update your Windows in time because there are more bug fixes in the newer updates. If you use to delay the update, follow these steps to keep your Windows up to date.

Step 1. Press Win + I to open Windows Settings .

Step 2. Go to Update & Security > Windows Update > Check for updates .

Step 3. If there is an update available for you, hit Download and install .

hit Download and install

Step 4. Restart your system to complete the update.

Is your Windows Update unable to check for updates? This guide might be helpful to you - [SOLVED] Windows Update Cannot Currently Check for Updates .