What is pcscm.exe?

The genuine pcscm.exe file is a software component of IBM iSeries Access for Windows by IBM.
IBM's iSeries Access for Windows product is a networking system allowing an enterprise with an IBM midrange server to use Windows PCs as clients. Both the midrange IBM server and the Windows PC have Access software on them. Only a network administrator should uninstall "pcscm.exe" or other IBM iAccess components. This process receives a signal after a user signs off of a Personal Communications session to clean up the PC's memory by uninstalling the code segment named PCSTQ.DLL and clearing shared variables. If the user closes the session window before signing out so that "pcscm.exe" is no longer running it will not get this signal or clean up memory and the next session will have problems. Sometimes "pcscm.exe" does not stop running after the session and must be stopped before a new one can begin. International Business Machines (IBM), headquartered in Armonk, NY, USA, was originally formed from several companies by its founder, Thomas Watson, in 1911 and acquired its current name from a Canadian subsidiary in 1924. It has progressively shifted its focus away from manufacturing consumer products and hardware towards enterprise solutions and cloud computing; in 2014 it was in the process of selling off microcircuitry manufacturing to become "fabless."

PCSCM stands for Personal Communications Session Control Module

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 pcscm.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 pcscm.exe related errors

Pcscm.exe file information

Windows Task Manager with pcscm
Pcscm.exe process in Windows Task Manager

The process belongs to software IBM iSeries Access for Windows or IBM AS/400 Client Access by IBM (

Description: Pcscm.exe is not essential for the Windows OS and causes relatively few problems. Pcscm.exe is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 16,384 bytes (22% of all occurrences), 15,872 bytes and 5 more variants. 
The program is not visible. Pcscm.exe is not a Windows system file. The program listens for or sends data on open ports to a LAN or the Internet. The file is a file with no information about its developer. Therefore the technical security rating is 60% dangerous, however you should also read the user reviews.

Uninstalling this variant: If you experience any issues with installation of pcscm.exe, you may want to uninstall the program using the Control Panel ⇒ Uninstall a ProgramIBM AS/400 Client Access or IBM iSeries Access for Windows.

Recommended: Identify pcscm.exe related errors

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

Installed with IBM iSeries Access
  Michael   (further information)
IBM service for pc5250 Client Access
Runs with as/400 emulator
It is part of IBM's Personal Communications (PCOMM)
Gehört zu AS400 Situngen
Part of the Client Access Software used by IBM to connect to an AS/400
my version 5070.10.4118.928 with size of 16,5 KB (16.896 bytes) has clear info about everything!
  Christian F.  
I came here because pcscm.exe was using 100% of one of my CPU cores, the cause was a session I had open that was in the 'end job confirmation' screen for 13,000 jobs that I was waiting to end. Once I F12'd out of this screen, logged off and exited the session my system returned to normal. Also, for the record, I ran a large macro to put a 4 against the 13,000 jobs. Hopefully this helps someone.

Rating chart

Summary: Average user rating of pcscm.exe: based on 8 votes with 8 user comments. 7 users think pcscm.exe is essential for Windows or an installed application. One user thinks it's probably harmless.

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Best practices for resolving pcscm issues

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

pcscm.exe [all]