How to remove the dllhost virus

Most antivirus programs identify dllhost.dll as malware—e.g. TrendMicro identifies it as ADW_PURITYSCA.Y, and Microsoft identifies it as Adware:Win32/Clickspring.C.

The free file information forum can help you find out how to remove it. If you have additional information about this file, please leave a comment or a suggestion for other users.

Click to Run a Free Virus Scan for the dllhost.dll malware

Dllhost.dll file information

The process does not provide any identification of the producer.

Description: Dllhost.dll is not essential for Windows and will often cause problems. Dllhost.dll is located in the C:\Windows\System32 folder. The file size on Windows 10/8/7/XP is 81,920 bytes. 
A .dll file (Dynamic Link Library) is a special type of Windows program containing functions that other programs can call. This .dll file can be injected to all running processes and can change or manipulate their behavior. There is no file information. It is not a Windows system file. The program is not visible. There is no detailed description of this service. It can change the behavior of other programs or manipulate other programs. The process starts when Windows starts (see Registry key: AppInit_DLLs). Therefore the technical security rating is 90% dangerous, however you should also read the user reviews.

Recommended: Identify dllhost.dll related errors

Important: You should check the dllhost.dll process on your PC to see if it is a threat. If dllhost.dll has changed your browser's search engine and start page, you can recover your browser's default settings as follows:

Reset default browser settings for Internet-Explorer ▾
  1. In Internet Explorer, press the key combination Alt + X to open the Tools menu.
  2. Click Internet options.
  3. Click the Advanced tab.
  4. Click the Reset... button.
  5. Enable the Delete personal settings option.
This will reset your Internet Explorer to its default settings. Your browser will start with the familiar start page and search engine—without popups, ads, cookies, but all browser add-ons are deleted too [1]. Make cleaning up your browser and your computer simpler and safer with Security Task Manager.


User Comments

I've got a Toshiba Qosmio X305-Q706. My laptop randomly turns the dedicated video cards on and off for about 15 seconds. It does this by cycling through the power management options. Checked the task manager and whenever this shenanigan happens it's because dllhost.dll is running. For each power plan changed, one dllhost.dll is run and closed.

One user is not sure about it.

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Best practices for resolving dllhost issues

The following programs have also been shown useful for a deeper analysis: Security Task Manager examines the active dllhost process on your computer and clearly tells you what it is doing. Malwarebytes' well-known anti-malware tool tells you if the dllhost.dll on your computer displays annoying ads, slowing it down. This type of unwanted adware program is not considered by some antivirus software to be a virus and is therefore not marked for cleanup.

A clean and tidy computer is the key requirement for avoiding PC trouble. This means running a scan for malware, cleaning your hard drive using cleanmgr and sfc /scannow, uninstalling programs that you no longer need, checking for Autostart programs (using msconfig) and enabling Windows' Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

Other processes

dllhost.dll [all]