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What is ptserial?

Ptserial.sys is a Windows driver. A driver is a small software program that allows your computer to communicate with hardware or connected devices. This means that a driver has direct access to the internals of the OS, hardware etc.
The free file information forum can help you determine if ptserial.sys belonging to the Windows system or an application you can trust.

Run a free scan to check for ptserial drivers in need of updating

Ptserial.sys file information

The process known as HSP Modem Serial Device Driver or HSP Modem Serial Device Driver for (version NT 5.0) belongs to software W2K Pctel Serial Device Driver or HSP Modem Serial Device by PCTEL, INC (www.pctel.com) or Conexant Systems (www.conexant.com).

Description: Ptserial.sys is not essential for the Windows OS and causes relatively few problems. ptserial.sys is located in the folder C:\Windows\System32\drivers. Known file sizes on Windows 7/XP are 135,292 bytes (29% of all occurrences), 324,590 bytes and 7 more variants. http://www.file.net/process/ptserial.sys.html 
The driver can be started or stopped from Services in the Control Panel or by other programs. The program is not visible. The service has no detailed description. Ptserial.sys is not a Windows core file. Therefore the technical security rating is 25% dangerous, however also read the users reviews.

Recommended: Identify ptserial.sys related errors

Important: Some malware disguises itself as ptserial.sys, particularly when not located in the C:\Windows\System32\drivers folder. Therefore, you should check the ptserial.sys 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

i try to instal a modem and the driver ask for ptserial.sys
  fernando garcia  
important for windows xp
motorola fax 56k driver can't install, that problem is ptserial.sys
i had a problem with that cuase when i updated my system to windows 7 i was getting bsod all time. i think its a driver but i dont know what it does.

Rating chart

Summary: Average user rating of ptserial.sys: based on 9 votes with 4 user comments.
5 users think ptserial.sys is essential for Windows or an installed application. 3 users think it's probably harmless. One user thinks ptserial.sys is dangerous and recommend removing it. 2 users don't grade ptserial.sys ("not sure about it").

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Ptserial scanner

Security Task Manager shows all running Windows tasks including embedded hidden functions (e.g. keyboard or browser monitoring, autostart entry). A unique security risk rating indicates the likelihood of the process being potential spyware, malware, keylogger or a Trojan.

Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, trojans, keyloggers, malware and tracking threats from your hard disk. Ideal supplement to Security Task Manager.

SpeedUpMyPC scans, cleans, repairs and optimizes your computer.

Other processes

ptserial.sys [all]