How to fix “Dllhost.exe not found” error on Windows?

by Gabriel E. Hall - -


Issue: How to fix “Dllhost.exe not found” error on Windows?

My PC often throws an error “Dllhost.exe not found.” It shows up under various conditions, for example, when trying to launch apps or remove some useless content. When it shows up, the process is not being executed and the system freezes. I have no idea why this is happening. Could someone please help?

Solved Answer

“Dllhost.exe not found” is a Windows OS specific error, which may occur due to the corrupted, damaged or accidentally deleted Dllhost.exe file, corrupted display adapter drivers,[1] disk errors, etc. Nevertheless, we will try to help you fix “Dllhost.exe not found” on Windows – check the step-by-step guide below.

The original Dllhost.exe file belongs to the Microsoft Windows Operating System and is known as COM Surrogate. It runs a process on Task Manager continually, which is responsible for the smooth performance of the DLL[2] based applications, controls the operations in Internet Information Services (IIS), and prepares the .NET[3] runtime for loading. The original Dllhost.exe file is located in the C:\\Windows\\System32 or C:\\Windows\\winsxs directory.

Dllhost.exe error on WindowsUnfortunately, but the Dllhost.exe file seems to be extremely vulnerable to various system changes and malware infections. Many people reported diverse errors regarding this file, one of which is “Dllhost.exe not found.” You may also get the following error messages related to this file: Dllhost.exe Application Error,” “Dllhost.exe is not a valid Win32 application,” “Dllhost.exe failed,” “Faulting Application Path: dllhost.exe,” and similar.

If Dllhost.exe file is located in the subfolder of the user profile, C:\\Windows, C:\\Program Files, C:\\Windows\\System32 or subfolder of Windows folder for temporary files, it’s security rating is more than 60% dangerous. It means that malware is hiding in your operating system. 

Security experts have found the following malicious programs named as Dllhost.exe: WORM_INJECT.OB, WORM_VB.GZP, W32.SillyFDC, and W32.Fontra. Therefore, to fix “Dllhost.exe not found” error, you’ll have to launch a scan with a professional anti-malware program.

Fix 1. Update Windows OS

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Usually, the problem may occur due to missing Windows updates or corrupted Windows update files. Therefore, we would recommend installing Windows updates or, if you have recently installed them, remove the installed updates and check if that helps. For this purpose, you should:

  • Press Win key + I and select Update & security
  • Press Check for Updates
  • Wait till the Windows Update dialog box appears. If there are any available updates, select the Install Updates button.Update Windows

Fix 2. Uninstall Windows updates

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To repair damaged system, you have to purchase the licensed version of Reimage Reimage.

In case the “Dllhost.exe not found” error occurred after the installation of the updates, you can uninstall updates or fix the error using Windows System File Checker. To remove the Updates, follow these steps:

  • Press Win key + I and select Update & Security
  • Click Update History link and select Uninstall Updates
  • Select the update that you have installed right before the “Dllhost.exe not found” error occurred and click Uninstall
  • Reboot your PC.Uninstall Windows Updates

Fix 3. Run System File Checker

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To repair damaged system, you have to purchase the licensed version of Reimage Reimage.

If Dllhost.exe not found error occurred due to damaged Windows system files, you can run Reimage repair software to fix them. If you prefer manual option, here's how to enter Windows System File Checker:

  • Right-click on Windows key and select Command Prompt (Admin)
  • Type sfc /scannow and hit EnterRun SFC scan
  • Wait while Windows System File starts and finishes scanning for the system file errors.

Fix 4. Check for Disk errors

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To repair damaged system, you have to purchase the licensed version of Reimage Reimage.

Disk errors might cause a variety of errors on Windows operating systems including “Dllhost.exe not found.” To fix it, run error check as follows:

  • Open File explorer (Win key + E)
  • In the left pane, click on This PC
  • Select the hard disk drive (start from C and proceed to others), right-click and pick Properties
  • Go to Tools tab
  • Click on CheckCheck disk for errors
  • Wait till Windows finishes the scan.

Fix 5. Re-register all DLL files

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To repair damaged system, you have to purchase the licensed version of Reimage Reimage.
  • In Cortana's search box, type in cmd
  • Right-click on the the search results and pick Run as administrator
  • When Command Prompt opens, type in the following:

    cd C:\\Windows\\system32

  • Hit Enter
  • Next, type in the following and press Enter again:

    for %i IN (dir /b *.dll) DO (regsvr32 /i/s %i)

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Prevent websites, ISP, and other parties from tracking you

Private Internet Access is a VPN that can prevent your Internet Service Provider, the government, and third-parties from tracking your online and allow you to stay completely anonymous. The software provides dedicated servers for torrenting and streaming, ensuring optimal performance and not slowing you down. You can also bypass geo-restrictions and view such services as Netflix, BBC, Disney+, and other popular streaming services without limitations, regardless of where you are.

A VPN is also crucial when it comes to user privacy. Online trackers such as cookies can not only be used by social media platforms and other websites but also your Internet Service Provider and the government. Even if you apply the most secure settings via your web browser, you can still be tracked via apps that you are connected to the internet. Besides, privacy-focused browsers like Tor is are not an optimal choice due to diminished connection speed.

Therefore, to stay completely anonymous and prevent the ISP and the government from spying on you, you should employ Private Internet Access VPN. It will allow you to connect to the internet while being completely anonymous, prevent trackers, ads, as well as malicious content. Most importantly, you will prevent the illegal surveillance activities that NSA and other governmental institutions are performing behind your back.


Recover your lost files quickly

Unforeseen circumstances can happen at any time while using the computer: it can turn off due to a power cut, a Blue Screen of Death (BSoD) can occur, or random Windows updates can decide to reboot the machine when you went away for a few minutes. As a result, your schoolwork, important documents, and other data might be lost.

Additionally, you might also be attacked by malware that can corrupt your Windows or encrypt files with a robust encryption algorithm, and ask for a ransom in Bitcoin for the decryption tool. Cybercriminals might not deliver what they promised, however, so it is better to attempt alternative file recovery methods that could help you to retrieve at least some portion of the lost data.

Data recovery software is one of the options that could help you recover your files. Once you delete a file, it does not vanish into thin air – it remains on your system as long as no new data is written on top of it. Data Recovery Pro is recovery software that searchers for working copies of deleted files within your hard drive. By using the tool, you can prevent loss of valuable documents, school work, personal pictures, and other crucial files.

About the author
Gabriel E. Hall
Gabriel E. Hall - Passionate computer expert

Gabriel E. Hall is an expert troubleshooter who has been working in the information technology industry for years.

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