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How to Fix TDSSKiller Not Running on Windows 11: Step-by-Step Solutions

TDSSKiller is a popular tool used to detect and remove rootkits and malicious software from Windows computers. However, sometimes users may face issues where TDSSKiller does not run or start properly on Windows 11.

This problem can be frustrating because it prevents you from scanning your system for hidden threats. Luckily, there are several straightforward solutions that you can try to get TDSSKiller working again.

In this article, we will guide you step-by-step through the most effective methods to fix TDSSKiller not running on Windows 11. Each step is explained in simple terms so that anyone can follow along easily.

By the end, you should be able to run TDSSKiller smoothly and keep your PC safe from harmful rootkits.

Quick Note: Prerequisites and Initial Checks

Before diving into troubleshooting, make sure you have the following in place:

  • Administrator Rights: TDSSKiller requires administrative privileges to scan system files. Ensure you are logged in as an administrator.
  • Download from Official Source: Always download TDSSKiller from the official Kaspersky website to avoid corrupted or fake versions.
  • Disable Conflicting Security Software: Sometimes other antivirus or security tools may block TDSSKiller from running. Temporarily disable them if possible.
  • Stable Internet Connection: Although TDSSKiller works offline, an internet connection can help if you need to download updates or additional tools.

Step 1: Run TDSSKiller as Administrator

One common reason TDSSKiller won’t start is due to insufficient permissions. Windows 11 restricts some actions for security reasons, so running TDSSKiller with elevated rights is essential.

  1. Locate the TDSSKiller.exe file on your computer.
  2. Right-click on the file and select Run as administrator.
  3. If prompted by User Account Control (UAC), click Yes to allow the program to run.

This ensures TDSSKiller has full access to scan protected system areas, which is why this step is often the simplest fix.

Step 2: Temporarily Disable Other Antivirus Programs

Sometimes, other antivirus or malware protection programs may interfere with TDSSKiller’s operation by blocking its execution. To avoid conflicts:

  1. Open your antivirus or security software.
  2. Find the option to temporarily disable real-time protection or shields.
  3. Disable these features for a short time.
  4. Try running TDSSKiller again as administrator.

Remember to re-enable your antivirus after the scan to keep your PC protected.

Step 3: Check for System File Corruption Using SFC

TDSSKiller may fail to run if Windows system files are corrupted or missing. Running the System File Checker (SFC) can fix this issue.

  1. Press Windows + S and type cmd.
  2. Right-click on Command Prompt and select Run as administrator.
  3. In the command window, type the following and press Enter:
sfc /scannow

This process will scan and repair corrupted system files. After it finishes, restart your computer and try running TDSSKiller again.

Step 4: Run TDSSKiller in Safe Mode

Safe Mode starts Windows with only essential drivers and services, which can help if malware or software conflicts prevent TDSSKiller from running normally.

  1. Click the Start button and select Settings.
  2. Navigate to System > Recovery.
  3. Under Advanced startup, click Restart now.
  4. After restart, go to Troubleshoot > Advanced options > Startup Settings and click Restart.
  5. When your PC restarts again, press 4 or F4 to enter Safe Mode.
  6. Once in Safe Mode, locate and run TDSSKiller as administrator.

Running TDSSKiller in Safe Mode reduces interference from other programs.

Step 5: Rename or Move the TDSSKiller File

Sometimes, malware targets TDSSKiller or certain files to prevent them from running. Renaming the executable or moving it to a different folder can bypass this block.

  1. Navigate to the folder containing TDSSKiller.exe.
  2. Right-click the file and select Rename.
  3. Change the name to something like TDSSKiller123.exe and press Enter.
  4. Try running the renamed file as administrator.

If this works, it means something was blocking the original file name.

Step 6: Update Windows and Drivers

Outdated Windows components or device drivers can cause compatibility issues. Keeping your system up to date ensures all programs, including TDSSKiller, run smoothly.

  1. Click Start and open Settings.
  2. Go to Windows Update and click Check for updates.
  3. Install any available updates and restart your PC.

After updating, try running TDSSKiller again.

Alternative Method: Use Command Line to Run TDSSKiller

If the graphical interface of TDSSKiller won’t open, you can try running it via Command Prompt:

  1. Open Command Prompt as administrator (see Step 3).
  2. Navigate to the folder where TDSSKiller is located using the cd command. For example:
cd C:UsersYourUsernameDownloads
  1. Type the following command and press Enter:
TDSSKiller.exe

This method can sometimes bypass issues with double-clicking the file.

FAQs

Why won’t TDSSKiller open on my Windows 11 PC?

This is usually due to lack of administrator rights, interference from other antivirus programs, or corrupted system files.

Is TDSSKiller safe to use?

Yes, TDSSKiller is a legitimate tool from Kaspersky designed specifically to remove rootkits and is safe when downloaded from the official website.

Can I run TDSSKiller without internet?

Yes, TDSSKiller works offline but having internet access can help update the tool or download additional files if needed.

What if TDSSKiller detects malware?

If malware is detected, follow the prompts to quarantine or remove it. You may need to restart your PC to complete the removal process.

Can malware block TDSSKiller from running?

Yes, some advanced malware tries to prevent removal tools like TDSSKiller from running. Running it in Safe Mode or renaming the executable can help overcome this.

When Nothing Works

If none of the above solutions fix the problem, consider the following final options:

  • Use Alternative Tools: Try other reputable malware removal tools such as Malwarebytes or HitmanPro.
  • Contact Kaspersky Support: Visit the official Kaspersky support page for expert assistance.
  • Restore Your System: Use Windows System Restore to revert your PC to a previous working state.
  • Professional Help: If you suspect advanced malware infection, consult a professional technician.

Conclusion

TDSSKiller is a powerful tool to remove stubborn rootkits, but it can sometimes face issues running on Windows 11. By following simple steps such as running as administrator, disabling conflicting antivirus software, using Safe Mode, and repairing system files, you can often resolve these problems quickly.

Remember to always download TDSSKiller from official sources and keep your operating system updated. If problems persist, alternative tools or professional support are good next steps.

With these solutions, you can confidently use TDSSKiller to keep your Windows 11 PC safe and malware-free.

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