What is wsftpsi.dll?

Wsftpsi.dll is a Windows DLL file. DLL is the abbreviation for Dynamic Link Library. DLL files are needed by programs or web browser extensions, because they contain program code, data, and resources. The following information can help you determine if wsftpsi.dll is a Windows system file or if it belongs to an application that you can trust.

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Wsftpsi.dll file information

The process known as wsftpsi Module belongs to software Ipswitch WS_FTP Pro or Ipswitch WS_FTP Professional (version 2007) or Ipswitch WS_FTP Home (version 2007) or Ipswitch WS_FTP (version 12) by Ipswitch ( (version 10 Maguire Road - Suite 220 Lexington, MA 02421, 81 Hartwell Ave. Lexington MA).

Description: Wsftpsi.dll is not essential for the Windows OS and causes relatively few problems. Wsftpsi.dll is located in a subfolder of "C:\Program Files"—generally C:\Program Files\Ipswitch\WS_FTP Pro\. Known file sizes on Windows 10/8/7/XP are 245,760 bytes (33% of all occurrences), 155,693 bytes and 8 more variants. 
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. The program has no visible window. The service has no detailed description. It can change the behavior of other programs or manipulate other programs. The file is not a Windows system file. Therefore the technical security rating is 65% dangerous, however you should also read the user reviews.

Uninstalling this variant: If you have any problems with wsftpsi.dll, you can do the following:
  1) safely remove the program using the uninstall program of Ipswitch WS_FTP Professional 2007 or Ipswitch WS_FTP Pro (Control Panel ⇒ Uninstall a Program)
  2) look for help on the website.

Recommended: Identify wsftpsi.dll related errors

Important: Some malware camouflages itself as wsftpsi.dll, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the wsftpsi.dll process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


User Comments

FTP Programm (WSFTP pro)
Use program for three years - excellent FTP software.
Reputable FTP management software - Nothing to fear
WSFTP Pro (9)

Rating chart

Summary: Average user rating of wsftpsi.dll: based on 6 votes with 4 user comments. 3 users think wsftpsi.dll is essential for Windows or an installed application. One user thinks it's probably harmless. One user thinks it's neither essential nor dangerous. One user thinks wsftpsi.dll is dangerous and recommends removing it.

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Best practices for resolving wsftpsi issues

A clean and tidy computer is the key requirement for avoiding problems with wsftpsi. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic 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 6resmon 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 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the wsftpsi.dll process on your computer, the following programs have proven to be helpful: ASecurity Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

wsftpsi.dll [all]