Exterminate It! Antimalware


Known threats:699,443 Last Update:May 26, 18:52



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File: winnsi.dll

Location of winnsi.dll and Associated Malware

Check whether winnsi.dll is present in the following locations:

winnsi.dll file locations that are Windows version independent:

  • C:\Program Files\Explorer\winnsi.dll
  • [%PROGRAM_FILESX86%]\Explorer\winnsi.dll

If you find winnsi.dll file in any of these locations, your computer is very likely to be infected with the following malware:

IMPORTANT: Malware files can be camouflaged with the same file names as legitimate files. The winnsi.dll file is associated with malware only if found in the locations listed above.


Different Variations of winnsi.dll File^

File SizeFile Md5Last Seen
217720839221C8887743452B990915B975C6034Mar 3, 2017
2179256CD92A89E1273197BB38D4E81ABA9430BMar 14, 2017
21577520108C9FBDD601F448A33B48C3E394048Mar 27, 2017
215519214044958C6CD835E88DD6F3C0849B26DApr 3, 2017
214853634F85BEF2046836AB4E5E1386299C971Apr 28, 2017
217720802459C7EA76B6AF3D40E3E29ED8012C9May 2, 2017
215519259A973665F58A0B82BFA5F92EF595F02May 8, 2017
21572401E673234D12F00FABB1D86B66C790210May 11, 2017
2177208A371250605F79F770C9C719D7D775DFCDec 14, 2018
21557049CBC48F06AB011B153B83848C9474719May 23, 2017
2179256644057F15E3428EF8E8EB539BA64A5BCMay 31, 2017

Why Is It Important to Remove Malware Files?^

It is imperative that you delete malware-associated files as soon as possible because they can be used - or are already being used - to inflict serious damage on your PC, including:

  • Disrupting the normal functioning of the operating system or rendering it completely useless.
  • Hijacking valuable private information (credit card numbers, passwords, PIN codes, etc.)
  • Directing all your Web searches to the same unwanted or malicious sites.
  • Dramatically slowing down your computer.
  • Gaining total control of your PC to spread viruses and trojans and send out spam.

How to Remove winnsi.dll^

  1. To enable deleting the winnsi.dll file, terminate the associated process in the Task Manager as follows:
    • Right-click in the Windows taskbar (a bar that appears along the bottom of the Windows screen) and select Task Manager on the menu.
    • In the Tasks Manager window, click the Processes tab.
    • On the Processes tab, select winnsi.dll and click End Process.
  2. Using your file explorer, browse to the file using the paths listed in Location of winnsi.dll and Associated Malware.
  3. Select the file and press SHIFT+Delete on the keyboard.
  4. Click Yes in the confirm deletion dialog box.
  5. Repeat steps 2-4 for each location listed in Location of winnsi.dll and Associated Malware.
  6. Notes:

    • The deletion of winnsi.dll will fail if it is locked; that is, it is in use by some application (Windows will display a corresponding message). For instructions on deleting locked files, see Deleting Locked Files.
    • The deletion of winnsi.dll will fail if your Windows uses the NT File System (NTFS) and you have no write rights for the file. Request your system administrator to grant you write rights for the file.

Deleting Locked Files^

You can delete locked files with the RemoveOnReboot utility. You can install the RemoveOnReboot utility from here.

After you delete a locked file, you need to delete all the references to the file in Windows registry.

To delete a locked file:

  1. Right-click on the file and select Send To -> Remove on Next Reboot on the menu.
  2. Restart your computer.

The file will be deleted on restart.

Note: In the case of complex viruses that can replicate themselves, malware files can reappear in the same locations even after you have deleted those files and restarted your computer. Exterminate It! Antimalware can effectively eradicate such viruses from your computer.

To remove all registry references to a winnsi.dll malware file:

  1. On the Windows Start menu, click Run.
  2. In the Open box, type regedit and click OK. The Registry Editor window opens.
  3. On the Edit menu, select Find.
  4. In the Find dialog box, type winnsi.dll. The name of the first found registry value referencing winnsi.dll is highlighted in the right pane of the Registry Editor window.
  5. Right-click the registry value name and select Delete on the menu.
  6. Click Yes in the Confirm Value Delete dialog box.
  7. To delete all other references to winnsi.dll, repeat steps 4-6.
IMPORTANT: Malware files can masquerade as legitimate files by using the same file names. To avoid deleting a harmless file, ensure that the Value column for the registry value displays exactly one of the paths listed in Location of winnsi.dll and Associated Malware.