What is Portmap.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 Portmap.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 Portmap.exe related errors

Portmap.exe file information

Windows Task Manager with Portmap
Portmap.exe process in Windows Task Manager

The process known as Creo 2.0 from PTC or ONC/RPC Portmap service for NT belongs to software PTC Portmapper or ONC/RPC Portmap Service/NT or ONC Portmapper by PTC.

Description: Portmap.exe is not essential for the Windows OS and causes relatively few problems. Portmap.exe is located in the C:\Windows\System32 folder or sometimes in a subfolder of C:\Windows. Known file sizes on Windows 10/8/7/XP are 45,056 bytes (57% of all occurrences), 32,768 bytes and 6 more variants. 
There is no file information. The program has no visible window. Portmap.exe is located in the Windows folder, but it is not a Windows core file. Portmap.exe is not a Windows system file. The process uses ports to connect to or from a LAN or the Internet. Therefore the technical security rating is 89% dangerous; however you should also read the user reviews.

Recommended: Identify Portmap.exe related errors

If Portmap.exe is located in a subfolder of "C:\Program Files", the security rating is 80% dangerous. The file size is 676,864 bytes (23% of all occurrences), 677,376 bytes and 7 more variants. The program is not visible. It is not a Windows core file. There is no description of the program. Portmap.exe is able to monitor applications.

Uninstalling this variant: The software publisher PTC provides direct support ( or and update information ( You could completely remove PTC Portmapper or DPO (Control Panel ⇒ Uninstall a Program).

Important: Some malware camouflages itself as Portmap.exe. Therefore, you should check the Portmap.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

If you have QLogic FC-HBAs the file is found in Program Files\QLogic Corporation\SANsurfer and is essential for use with your Fibre Channel Host Bus Adapters.
  Andreas Dully   (further information)
is installed or executed by Winshape, simulation software by Heidenhein
  kokos   (further information)
Portmap.exe wird unter anderem von Kuka - Software benötigt ( 40960 Byte Größe ), Officelite Demo ohne portmap.exe läuft nicht richtig
  Michael   (further information)
Ist ein Service von PTC Pro/Engineer
Haben probleme da diese datei beschädigt oder gar fehlt :x
  Aqwintus   (further information) (further information)
Rohde & Schwarz process, needed for remote controle of R&S Measurement Equipment (Professionnal Applications)

Summary: Average user rating of Portmap.exe: based on 4 votes with 6 user comments. 3 users think Portmap.exe is essential for Windows or an installed application. One user thinks it's probably harmless. 2 users don't grade Portmap.exe ("not sure about it").

Do you have additional information? Help other users!
What do you know about Portmap.exe:
How would you rate it:
Link for more info:
Your Name:

Best practices for resolving Portmap issues

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

Portmap.exe [all]