What is d347bus?

The genuine d347bus.sys file is a software component of Daemon Tools Suite by Daemon Tools.
The file is a driver for DAEMON Tools. DAEMON (Disk And Execution MONitor tools) Tools is a virtual drive and optical disc authoring program for Microsoft Windows and Mac OS. There are a number of products available through Daemon Tools providing similar services but with varied functionality.

D347bus.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 d347bus.sys is a Windows system file or if it belongs to an application that you can trust.

Run a free scan to check for d347bus drivers in need of updating

D347bus.sys file information

The process known as PnP BIOS Extension or d347bus belongs to software d347bus by unknown.

Description: D347bus.sys is not essential for the Windows OS and causes relatively few problems. The file d347bus.sys is located in the C:\Windows\System32\drivers folder. The file size on Windows 10/8/7/XP is 155,136 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. There is no file information. The program is not visible. The service has no detailed description. The d347bus.sys file is not a Windows core file. d347bus.sys appears to be a compressed file. Therefore the technical security rating is 46% dangerous, however you should also read the user reviews.

Recommended: Identify d347bus.sys related errors

Important: Some malware disguises itself as d347bus.sys, particularly when not located in the C:\Windows\System32\drivers folder. Therefore, you should check the d347bus.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

BIOS Treiber
  Andreas Hillinger  
logged onto a forum that i regularly visit, 1st the page said downloading then the page loaded, did an immediate scan with AdAware & detected spyware.Yet system properties said it was needed by a PnP bios extension. I removed the reference in properties rebooted & all is fine.
Its drivers for deamon tools
  Fredric   (further information)
Its a Daemon Tools driver
a driver used with Daemon Tools
  Anon   (further information)
Daemon tools driver to setup virtual devices for mounting images.
  Dustin   (further information)
Cause damage to the system, and Windows failed during loading system.It's the driver for deamon tools.
That Daemon Tools virtual CD-DVD driver
  Henry   (further information)
can't go in veilige modus
Deamon Tools driver
Daemon tools driver
Maybe, it´s Daemon´s driver, but XP gets unstable about this file and u get blue screens every time u boot related to this file, I had to cancel the service that uses this file working in the XP installation repairing console, and then I could uninstall the pnp bios extension n control panel - system ´cause it was causing some conflict and this sued the d347bus.sys, now everyhin is working fine
Daemon tools driver, can cause boot failure
  Ross Greenall  
Daemon Tools Driver
  Kent Bolton  
Virtual SCSI driver installed by Daemon Tools v3.47 - harmless
  [H]omer   (further information)
its a driver for the virtual cd in Deamontools.
d347bus.sys is driver installed by Daemon Tools (virtual CD/DVD drive).
Harmless but essential file for Daemon Tools. If there is a problem, boot into safe mode and delete it and and d347prt.sys from windows\system32\drivers\, then boot into windows as normal and uninstall daemon tools, restart again, then reinstall daemon tools (if you still want it on)
  Brian Levy-Polis  
Daemon Tools : Essential driver for virtual CD-Rom, DVD-Rom
  Simo Bk   (further information)
daemon tools, poses problems when uninstalling daemon tools virtual drive software
keeps restarting my pc with the following - Error code 100000ea, parameter1 8514d638, parameter2 853955d0, parameter3 f7c5dcb4, parameter4 00000001
  bruce keys   (further information)
my computer HANGS when loading so start in safemode is ok only if i dont load the D347bus.sys I think it got corupted or it not goodso I'm deleteing it
It stores configuration data directly connected to the bios setup. It's needed.
Dameon tools driver... Almost certain to cause system failure if you play any games or use any software that checks for emulation as they will attempt to stop it.
I have had problems and only since i have installed Deamon tools, safe mode won't load up because of this file and its hard to get back into xp, am guessing because of this file, i would remove it if you have it, i have done and hasn't affected xp nor Deamon tools (it's fixed my problem)
Daemon tools item, caused boot failure. Connected hdd to another computer, added file where windows said it was missing. Boot failure fixed, removed daemon tools, re-installed. No problems forthwith.
  John   (further information)
this is virtual scsi driver used by DaemonTools
  Oleg Konovalov  
My windows did automatically a restart every time i tried to start it. I don't know why this problem occured but after i have deleted this file in prompt the system has started corectly.
When I boot in safe mode considering d347bus.sys, the computer turn off with no posibility of interaction
Make sure that your d347bus.sys is located in the folder C:\Windows\System32\drivers. It's necessary for Daemon Tools. If you have more than 1 d347bus.sys or it is not where it should be then fix it. It is NOTdangerous when it is the legitimate file.
Daemontools virtual scssi driver
I've had Daemon Virtual CD Install for two years without problems. I installed a virtual floppy driver and my system started crashing when loading the d347bus.sys. At this point, I do not know if it is a conflict between the two programs or if the virtual floppy program is the whole problem.
  Mike Stickler   (further information)
This file was left on the machine, and it's still loaded after uninstall. Use special removal tools, if you want to get rid of it. If you are using daemon (brilliant program) u need it.
Daemon Tools driver: if you installed windows service pack 2 and are using a ATA HD then it will bluescreen you or make your startup play a loop... to fix, rename that file and sptd.sys... well it worked for me anyways. Either that or you can reinstall seems like you need it b/c if you didnt it would start-up... windows deems it as a virus i think...
If you have an ATA HD and Windows service pack 2, your comp will either get bluescreened or play a startup loop and never load
Suspect its associated with ZoneAlarm 70_302_000. File prevented XP SP2 from starting. Reinstalled ZA and now it all appears to be working again.
daemon tools driver and it may give this error when u disable primary or secondary ide channels
Deamon tool driver for virtual drive. may enter in conflict with other drive and generate errors at start up
I had the same problem as above; Windows wouldn't boot, it was the SCSI Driver of Daemon Tools, only the file name was different, it was dtscsi.sys. So if you can't find the variant d347bus.sys or d347prt.sys, try dtscsi.sys.
Daemon tools driver. Can cause booting trouble. Was able to remove with safe mode, and then boot succesfully.
had to delete it to get my pc back up and running... error while booting after blackout...
When I boot in safe mode considering d347bus.sys, the computer turn off with no posibility of interaction. I have WXP with SP2 and using Demaon Tools... but the problem appear after other software installation. I deleted it, but this file is not the problem. Finally, I have reinstalled the OS
  Joan Mir  
it's Daemon File, it made my xp hang (black screen after windows logo), rename/delete it to make windows booting normal.
  Eri Winadnar  
Daemon Tools driver file, KernelMode hook (may show up as a rootkit) to create a virtual CD/SCSI drive. If this file is removed or corrupted and Daemon tools or Windows tries to load it, it has the potential to cause a blue screen (STOP error). The simplest fix is to enter Windows in Safe Mode and uninstall the program and verify that the machine boots normally afterwards. Also check your STOP code (0x########) against as not all STOPs mean the same thing.
  Eaglebird   (further information)

Rating chart

Summary: Average user rating of d347bus.sys: based on 66 votes with 45 user comments. 34 users think d347bus.sys is essential for Windows or an installed application. 6 users think it's probably harmless. 13 users think it's neither essential nor dangerous. 11 users suspect danger. 2 users think d347bus.sys is dangerous and recommend removing it. 4 users don't grade d347bus.sys ("not sure about it").

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Best practices for resolving d347bus issues

A clean and tidy computer is the key requirement for avoiding problems with d347bus. 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 d347bus.sys 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

d347bus.sys [all]