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 Steam.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.
The process known as Steam Client Bootstrapper or Steam Client Bootstrapper (buildbot_winslave04_steam_steam_rel_client_win32@winslave04) or Steam 732897
belongs to software Steam Client Bootstrapper or Terraria or Counter-Strike or Call of Duty: Modern Warfare (version 2) or Half-Life (version 2, 2: Deathmatch) or Orcs Must Die or The Elder Scrolls V: Skyrim or Fallout (version 3 - Game of the Year Edition) or PAYDAY 2 or Torchlight II or Arma 3 or Audiosurf or XCOM: Enemy Unknown or Dota 2 or The Witcher (version 3: Wild Hunt) or Neverwinter or Counter-Strike: Global Offensive or Sid Meier's Civilization V or Bastion or Team Fortress (version 2) or Killing Floor or Age of Empires® III: Complete Collection or Audiosurf Demo or Call of Duty: World at War or Star Wars: Knights of the Old Republic II or Kingdoms of Amalur: Reckoning or Citadels or Source SDK or Empire: Total War or Dead Space or The Walking Dead or Super Monday Night Combat or Grand Theft Auto: San Andreas or Portal or Sid Meier's Civilization V SDK or ORION: Prelude or L.A. Noire or Railroad Tycoon (version 3) or Call of Duty: Black Ops II or Tomb Raider
by Valve (www.valvesoftware.com).
Description: Steam.exe is not essential for the Windows OS and causes relatively few problems. Steam.exe is located in a subfolder of "C:\Program Files" (mostly C:\Program Files\Valve\Steam\).
Known file sizes on Windows 10/8/7/XP are 1,242,448 bytes (9% of all occurrences), 3,013,712 bytes and 61 more variants.
Steam.exe is not a Windows system file. The program is loaded during the Windows boot process (see Registry key: Run, MACHINE\Run, User Shell Folders, DEFAULT\Run). The Steam.exe file is certified by a trustworthy company. It is a Verisign signed file. The program is not visible. Steam.exe is able to monitor applications and record keyboard and mouse inputs. Therefore the technical security rating is 38% dangerous; however you should also read the user reviews.
Recommended: Identify Steam.exe related errors
If Steam.exe is located in a subfolder of C:\, the security rating is 36% dangerous. The file size is 2,899,136 bytes (10% of all occurrences), 1,242,448 bytes and 26 more variants. The Steam.exe file is not a Windows system file. The file has a digital signature. The software starts when Windows starts (see Registry key: Run, MACHINE\Run, User Shell Folders, DEFAULT\Run). The program has no visible window. It is a Verisign signed file. Steam.exe is able to monitor applications and record keyboard and mouse inputs.
If Steam.exe is located in a subfolder of the user's profile folder, the security rating is 67% dangerous. The file size is 1,074,111 bytes (26% of all occurrences), 1,469,549 bytes and 10 more variants. The Steam.exe file is not a Windows system file. The program is not visible. There is no information about the author of the file.
If Steam.exe is located in a subfolder of the user's "Documents" folder, the security rating is 60% dangerous. The file size is 2,901,584 bytes.
External information from Paul Collins:
There are different files with the same name:
Important: Some malware camouflages itself as Steam.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder, for example Generic PUA PB (detected by Sophos), and Trojan.Gen.2 or Trojan.ADH.2 (detected by Symantec). Therefore, you should check the Steam.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.
A clean and tidy computer is the key requirement for avoiding problems with Steam. 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 Steam.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.