File windows system32 drivers disk sys

PnP Disk Driver by Microsoft Corporation.

Default Settings

Default Behavior

Disk Driver is a kernel device driver. In Windows 10 it is starting by the operating system Boot Loader as a part of the driver stack for the boot volume. If Disk Driver fails to start, the failure details are being recorded into Event Log. Then Windows 10 will start up and notify the user that the disk service has failed to start due to the error.

Restore Default Startup Configuration of Disk Driver

1. Run the Command Prompt as an administrator.

2. Copy the commands below, paste them into the command window and press ENTER:

sc config disk start= boot

sc start disk

3. Close the command window and restart the computer.

The disk service is using the disk.sys file that is located in the C:\Windows\System32\drivers directory. If the file is removed or corrupted, read this article to restore its original version from Windows 10 installation media.

The genuine disk.sys file is a software component of Microsoft Windows Operating System by .
«Disk.sys» is Microsoft’s generic storage class driver, located in «C:\Windows\System32\drivers». It has an important role in power management and managing Plug-and-Play (PnP) for disk or storage devices that are attached or removed. Its driver object contains physical device objects (PDOs) for physical storage devices attached to the system, which includes enumerating partitions on disks, creating a PDO for each. It is the driver that receives I/O request packets (IRPs) and translates them to SCSI request blocks (SRBs) to pass down the rest of the driver chain toward the physical device. If it is corrupted Windows may be unable to start.

Disk stands for PnP Disk Class Driver

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

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

Disk.sys file information

The process known as PnP Disk Driver belongs to software Microsoft Windows Operating System by Microsoft (www.microsoft.com).

Description: Disk.sys is not essential for the Windows OS and causes relatively few problems. Disk.sys is located in the C:\Windows\System32\drivers folder.
Known file sizes on Windows 10/11/7 are 77,728 bytes (33% of all occurrences), 57,424 bytes or 36,352 bytes.  
The driver can be started or stopped from Services in the Control Panel or by other programs.
The program is not visible. There is no detailed description of this service. The disk.sys file is a Microsoft signed file. It is digitally signed. Disk.sys is not a Windows core file.
disk.sys appears to be a compressed file.
Therefore the technical security rating is 3% dangerous; but you should also compare this rating with the user reviews.

Uninstalling this variant:
If you encounter difficulties with disk.sys, you can also do the following:
  1) uninstall the program using the Control Panel ⇒ Uninstall a Program ⇒ Microsoft Windows
  2) look for help from the software company Microsoft.

Recommended: Identify disk.sys related errors

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

Best practices for resolving disk issues

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

wlcrasvc.exe resetusbservice.exe gputemp.exe disk.sys ps.exe bcwipetm.exe winalert.exe upsms.exe joxi.exe aac3572mbhal_x86.exe eragent.exe [all]

For the last couple of days I’ve been trying to install Windows 7 64-bit on my new ACER Aspire X3470 that came with Windows 8 preinstalled. Looks like it only supports UEFI since I couldn’t find any other setting in BIOS utility.  When I try to boot it from the Win 7 DVD it’s hanging on “Starting Windows” screen after the files are loaded and the system is rebooted. I tried to run it in “Safe mode with Command prompt” and it stops at:

Loading Windows Files:

Loaded: …\system32\drivers\disk.sys

When I start the installation from Win 8 interface and choose disk partition that was created with Win 8 I’m getting this message:

“The partitions on the disk selected for installation are not in recommended order. For additional information about installing to GPT disks go to the Microsoft website and search for GPT. Do you want to proceed with installation?”

If I go ahead it’s hanging again on “Loaded: …\system32\drivers\disk.sys” after the system is rebooted.

I’ve tried to delete all partitions on the disk and convert it to MBR but the result was still the same probably because it’s an UEFI system and works only with GPT disks.

I’ve also tried to create and EFI-only version of Windows setup using oscdimg.exe per this: http://www.insanelymac.com/forum/topic/184349-force-windows-7-install-dvd-to-do-an-efi-boot/

but the result was still the same.

I’ve got Windows 7 installation disk from MSDN with my subscription. Also tried Windows server 2008R2 installation (since my ultimate goal is to use it with Hyper-V) but the result was exactly the same.

Do I have any other options?