What is putty.exe?

The .exe extension on a filename indicates an executable file. Executable files may, in some cases, harm your computer. Therefore, please read below to decide for yourself whether the putty.exe on your computer is a Trojan that you should remove, or whether it is a file belonging to the Windows operating system or to a trusted application.

Click to Run a Free Scan for putty.exe related errors

Putty.exe file information

The process known as SSH, Telnet and Rlogin client belongs to software PuTTY suite by Simon Tatham (

Description: Putty.exe is not essential for the Windows OS and causes relatively few problems. Putty.exe is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 454,656 bytes (50% of all occurrences), 524,288 bytes, 421,888 bytes or 372,736 bytes. 
Putty.exe is not a Windows core file. Therefore the technical security rating is 34% dangerous; however you should also read the user reviews.

Recommended: Identify putty.exe related errors

Important: Some malware camouflages itself as putty.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the putty.exe 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

SSH Client
Its ssh program to communicate from Windows to Linux
  Simon Priscilla  
great SSH/Telnet Client
  Oliver Henning   (further information)
terminal client for secure tunneling and terminal control
  Dynom   (further information)
It's a telnet/Ssh program
  Gerdazech   (further information)
same as telnet, just secured data transfer
  Attila Simon  
SSH - Software
PuTTY is a cross platform terminal emulator
  Rich Smith  
dangerously interferes with windows control interface
Perfektes SSH/Telnet-Programm
A free telnet and SSH-client for Windows from Simon Tatham. Current version (as of December 2008) is 0.60 with a file-size of 454.656 bytes
  F. Tschernitz   (further information)
windows best ssh client
  Patrick   (further information)

Rating chart

Summary: Average user rating of putty.exe: based on 17 votes with 12 user comments. 14 users think putty.exe is essential for Windows or an installed application. 2 users think it's neither essential nor dangerous. One user thinks putty.exe is dangerous and recommends removing it. One user is not sure about it.

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Best practices for resolving putty issues

A clean and tidy computer is the key requirement for avoiding problems with putty. 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.

To help you analyze the putty.exe process on your computer, the following programs have proven to be helpful: Security 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. Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

putty.exe [all]