What is fcdabus?

Fcdabus.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 fcdabus.sys is a Windows system file or if it belongs to an application that you can trust.

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

Fcdabus.sys file information

The process known as FarStone Bus Enumerator belongs to software fcdabus or VirtualDrive Pro by FarStone (

Description: Fcdabus.sys is not essential for the Windows OS and causes relatively few problems. The fcdabus.sys file is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 10,899 bytes (66% of all occurrences), 17,840 bytes or 18,448 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. The program has no file description. The program is not visible. The service has no detailed description. It is not a Windows system file. fcdabus.sys appears to be a compressed file. Therefore the technical security rating is 34% dangerous, however you should also read the user reviews.

Uninstalling this variant: If you have any problems with fcdabus.sys, you may also uninstall the associated program (Start > Control Panel > Uninstall a Program > VirtualDrive Pro).

Recommended: Identify fcdabus.sys related errors

Important: Some malware disguises itself as fcdabus.sys, particularly when not located in the C:\Windows\System32\drivers folder. Therefore, you should check the fcdabus.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 have been using the Virtual Drive software
  Victor Pirie  

Summary: Average user rating of fcdabus.sys: based on 1 vote with 1 user comment. One user thinks fcdabus.sys is essential for Windows or an installed application.

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Best practices for resolving fcdabus issues

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

fcdabus.sys [all]