Programs Which May Interfere with Steam

Are there any programs which may interfere with Steam?

Any applications running in the background may negatively affect your games or Steam itself. Certain applications can lead to more serious issues such as limited connectivity and game crashes. It is highly recommended that you close all background applications before launching Steam to ensure the best performance and stability. After you are done playing, feel free to re-enable these applications.

The applications listed below have been known to interfere with Steam and Steam games:

Hidden Processes

Certain applications may load when Windows starts and are not obviously indicated. For example, they may not appear in the Windows task bar but they may be among some of your active processes, using your system's resources. These programs may cause crashes and other difficulties using Steam and playing games.

Please see the How to Disable Background Applications article to see instructions for disabling non-essential background programs and preventing background applications from silently loading when Windows starts.

Software to Look For

The following applications have been known to cause issues with Steam and playing games:

Anti-Virus Applications - Any Anti-Virus program could potentially block Steam and Steam game access, especially when not properly configured for use with Steam. Please make sure that Steam and all Steam games are listed as exceptions in these programs. If the issue persists, please try disabling or temporarily uninstalling the program to test the issue.

• Avast!
• AVG Anti-virus *
• BitDefender
• F-Secure
• Iobit Advanced System Care *
• Kaspersky Anti-virus
• McAfee Anti-virus
• Nod32 Anti-virus *
• Norton/Symantec Anti-virus
• Panda Anti-virus
• Threatfire
• Trend Micro
• VIGuard Anti-virus

Anti-Spyware Applications

• Ad Aware
• CA Pest Patrol
• PC Tools Spyware Doctor with AntiVirus (may need to disable Full-Screen detection in the Advanced settings)
• Spybot Search & Destroy
• Spycatcher Express
• Spyware Doctor
• Spyware Terminator
• Webroot Spy Sweeper *

Firewall/Security Applications

• CA Internet Security Suite
• Comodo (With Portal 2 running the firewall in Defense+ in training mode allows the game to run)
• CYBERsitter
• ESET Smart Security
• Netlimiter
• McAfee Personal Firewall
• Nvidia Network Access Manager/Firewall *
• Nvidia ForceWare Intelligent Application Manager
• Outpost Firewall (Disabling System Guard under Proactive Protection allows Portal 2 to run)
• Panda Internet Security
• Peer Guardian
• PeerBlock
• Tiny Personal Firewall
• Verizon Internet Security Suite
• Zone Alarm
• Constant Guard by Comcast
• Online Armor

Other Applications

• IOBit Advance System Care
• IOBit Start Menu 8
• Airfoil
• Alcohol 120%
• AMD External Event Utility
• AOLacsd.exe (AOL connection driver)
• ATI Hotkey Poller
• ATI Tray Tools
• BitTorrent/uTorrent (all clients)
• Creative Software (X-Fi MB, Alchemy, MediaSource 5 on Asus G60VX models specifcally)
• Catalyst AI
• CCleaner
• Daemon Tools
• Download Accelerators (all clients)
• EVGA Precision
• Garfield Daily Desktop Comic
• GhostSurf 2007
• Google Toolbar, Google Updater
• GSC
• Hamachi
• HotSpot Shield
• HydraVision
• iZ3D DirectX injection
• K-Lite Codec Pack
• Lightspark
• LimeWire, BearShare or other Peer 2 Peer applications
• LogMeIn
• Microsoft Screen Magnifier in Windows 7 (magnify.exe - may cause in-game cursor issues)
• MSI Afterburner
• nProtect GameGuard *
• PC Time Limit
• Skype
• Slysoft AnyDVD
• StarDock KeepSafe
• StarDock ObjectDock
• SteamWatch
• iolo System Mechanic
• TeamSpeak (can lead to mic issues)
• Total Recorder
• Tuneup WinStyler Theme Service
• UPEK Protector Suite
• Ventrilo (can lead to mic issues)
• VirtuaGirl 2
• VMware
• Western Digital Backup Anywhere
• Whitesmoke Translator (may cause the Source engine to crash)
• WindowBlinds
• Xfire

* We recommend that applications listed in bold with a ( * ) symbol are fully uninstalled from your system if disabling them does not resolve the issue

Details

Issues related to any of the programs listed below may be resolved by exiting and/or disabling the program and then exiting and restarting Steam. For certain applications, a system reboot may be required after you have shut down or disabled them.

• Antivirus Software

  Incorrectly configured antivirus software may prevent proper operation of Steam and Steam games.

  • VIGuard anti-virus software has been found to conflict with Steam games - an error message stating "Failed to duplicate pipe handle" will be generated when attempting to load the game. Add the contents of your Steam installation folder to VIGuard's authorized folder exceptions list to correct this issue. 
  • AVG 7.5, Norton/Symantec and Nod 32 software has been known to cause game crashes. AVG 7.5 must be fully removed from your system in order to prevent these crashes.
  • F-Secure's "DeepGuard" feature is known to cause Error Code 51 when launching Steam games.

• Anti-Spyware Software

  Aggressive spyware detection software may block the normal operation of Steam. We have received reports that Spycatcher Express, Webroot Spy Sweeper and CA Pest Patrol (bundled with AOL's Security Center) may prevent Steam client application updates and connecting to game servers.

  PC Tools ThreatFire software (which is also contained in PC Tools Spyware Doctor) can prevent the normal operation of loading of Steam games, including common errors such as Unable to load filesystem_steam.dll and Engine Error: Could not load library client. If you are encountering Steam errors and have ThreatFire or Spyware Doctor installed, please do the following:

  • Disable Behavior Guard via PC Tools My Account service. Disabling the service through Intelli-Guard will not resolve the issue.
  • If this fails to resolve the issue, fully disabling or uninstalling ThreatFire or Spyware Doctor may be necessary.

• Peer-to-Peer (P2P) Clients

  P2P programs such as Kazaa, LimeWire, BitTorrent, E-mule, and Exeem can consume a large portion of your bandwidth, which may prevent Steam from connecting. Do not run file sharing applications while you are using Steam.

• Firewalls

  Newer versions of COMODO Internet Security includes a sandbox feature that may disable services that Steam needs to run on. Make sure important services are not being run in the sandbox mode.

• FTP and Web Server Applications

  As with P2P programs, these programs are generally very bandwidth-intensive and may generate errors in Steam. Examples include IIS services for Windows, Apache web server and MySQL servers.

• IP Filtering Programs

  Peer Guardian, CYBERsitter, and Netlimiter have been found to cause Steam connection issues. These programs are not compatible with Steam and must be disabled or permanently removed from the computer in order to avoid conflicts.

• IP Masking Programs

  Programs designed to mask your IP (GhostSurf 2007, Anonymizer, etc) will impact Steam's ability to send and receive data.

• Download "Accelerator" and Download Manager Programs

  These programs may interfere with installing and/or downloading updates through Steam. Download accelerator programs should be disabled while using Steam.

  Additionally, Internet Download Manager has been found to cause crashes when the Steam Storefront is loaded.

• Windows Theme Editors

  Tuneup WinStyler Theme Service has been found to cause a crash with the Steam client application and WindowBlinds may cause crashes with Source games.

• Virtual Private Network (VPN) Software

  VPN software will prevent the Steam client application from accessing the Steam network.

• Other Applications

  • Look'n'Stop has been reported to cause issues with Steam when its "Unknown UDP Packet" filter is enabled.
  • PowerStrip custom display modes software may cause issues with load time and crashing in games - it is recommended that you select the "Restore to default" setting in PowerStrip before playing (you may resume using PowerStrip normally once you are done).
  • The nVidia Network Access Manager has been found to cause problems as described in the Nothing appears on the Storefront screen in Steam topic.
  • Airfoil will cause the error "Game name failed to start (error code 51)." if "Instant Hijack" is enabled. You will either need to disable "Instant Hijack" (you do not need to restart your computer when prompted) or add Steam and all Steam games to the excluded programs.
  • Lightspark may cause crashes when viewing screenshots or other media in the Steam client. If you are experiencing such a crash and have this program installed, please remove it.

In-Game Overlay Application Incompatibility List

• X-Fire

  The in-game overlay may not function if X-Fire is running and also trying to draw its in-game chat interface on the game you have launched.

  Workaround:

  Close X-Fire, or set it to not attempt to run its in-game portion on games not launched via X-Fire.

• Windows Blinds

  Reported as possibly preventing the in-game overlay from functioning in some games.

  Workaround:

  We are currently investigating a solution to this issue. In the mean time, please do not use Window Blinds with Steam.

• Ventrilo

  Reported that the in-game hot-key bindings for Ventrilo may stop working with the overlay.

  Workaround:

  This has been reported to be a Vista issue and making the involved apps Run as Administrator solved the problem.