What is ASCTRM?

The genuine ASCTRM.sys file is a software component of RealPlayer by RealNetworks.
ASCTRM.sys is a driver file associated with Real Player, a program used to play and stream online media. A driver is a program that allows communication between the software and hardware devices of a computer. This file is not a critical Windows component and should be removed if known to cause problems. RealPlayer (originally RealOne Player) is an adware program developed and marketed by RealNetworks which is mainly used for media playback. It was first released in 1995 as 'RealAudio Player' and became one of the first media players to stream online content. RealPlayer is compatible with numerous media formats including MP3, MPEG-4, QuickTime, Windows Media, and also proprietary RealAudio and RealVideo formats. RealPlayer is based on the Windows platform but has other versions available that support Linux, Unix, Palm OS, Windows Mobile and Symbian operating systems. RealPlayer is powered by Helix, an open-source engine. RealNetworks, Inc. is an American company that develops software that can stream online media. The company was responsible for the development of RealAudio and RealVideo - audio and video compression formats; Unifi, a Cloud media service that can host personal content; Rinse, a tool that cleans up media libraries; and Helix technology for enabling digital media to be transmitter to PCs, mobile phones and other devices. RealNetworks was founded in 1995 and is headquartered in Seattle, Washington, USA.

ASCTRM stands for ASCTR Manager

ASCTRM.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 operating system, hardware etc. The free file information forum can help you determine if ASCTRM.sys is a Windows system file or if it belongs to an application that you can trust.

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

ASCTRM.sys file information

The process known as TR Manager belongs to software Windows (version 2000 DDK driver) by Windows ( (version 2000 DDK provider).

Description: ASCTRM.sys is not essential for Windows and will often cause problems. ASCTRM.sys is located in the C:\Windows\System32\drivers folder. The file size on Windows 10/8/7/XP is 8,552 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. The program has no visible window. There is no detailed description of this service. The file is not a Windows core file. ASCTRM.sys appears to be a compressed file. Therefore the technical security rating is 40% dangerous, however you should also read the user reviews.

Recommended: Identify ASCTRM.sys related errors

Important: Some malware camouflages itself as ASCTRM.sys. Therefore, you should check the ASCTRM.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

asctrm.sys is installed thru RealPlayer. You do a disservice by not mentioning this is not malware.
Realplayer........ Again
It's installed with RealPlayer
    (further information)
Well...I hope it is OK cause i am gonna allow this file...LOL
RealPlayer DRM control.
  Alex Sobral   (further information)
windows defender quarintined it
I uninstalled Real Player Basic and the file went away as well as the service stopped running - This is DEFINITELY part of Real Player
  Michael Evenson  
Microsoft say it's a Realplayer service and removable
  Peter Brooks   (further information)
Its something that has been added to my computer as a new item in the last 24 hours.Real Player almost seems more like a virus than anything else!
Got a BSOD with stop error code 0xc5
Antivirus XP 2010 uses this as a cover.
  Owen J  

Rating chart

Summary: Average user rating of ASCTRM.sys: based on 10 votes with 11 user comments. One user thinks it's probably harmless. 5 users think it's neither essential nor dangerous. One user suspects danger. 3 users think ASCTRM.sys is dangerous and recommend removing it. 3 users don't grade ASCTRM.sys ("not sure about it").

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Best practices for resolving ASCTRM issues

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

ASCTRM.sys [all]