Re: Bcdedit.exe Download Windows 7
Beatris Ninh
BCDEdit is a command-line tool for managing BCD stores. It can be used for a variety of purposes, including creating new stores, modifying existing stores, adding boot menu parameters, and so on. BCDEdit serves essentially the same purpose as Bootcfg.exe on earlier versions of Windows, but with two major improvements:
"On 64-bit windows whenever a 32-bit app attempts to access %windir%\System32 directory, the access will be redirected to %windir%\SysWOW64. This process is transparent to the application and it still thinks it is accessing %windir%\System32 directory."
The boot configuration data of the system could not be updated.
Use bcdedit.exe to update it manually. Note that bcdedit.exe is not
available on Windows 2003 Server. Edit boot.ini or use
bootcfg.exe instead.
It happens because when you run the Command Prompt via Start Menu or even the Execute window you are running the 64-bit cmd version, located at C:\Windows\System32\cmd.exe, however when call cmd from your c program it calls the 32-bit cmd version, located at C:\Windows\SySWOW64\cmd.exe. This happens because your C compiler generates a 32-bit application.
The problem is that Windows x64 provides a 64-bit bcdedit.exe in the System32 folder, but doesn't provide a 32-bit bcdedit.exe anywhere. So the 32-bit cmd can't run the 64-bit bcdedit, so it returns that this command is invalid.
I think you have cut one command into two part.And I think you want to run "bcdedit.exe /timeout 3",but you give theargument of the system command two parts, one is "bcedit.exe", another is "/timeout 3". I think you should wrote this
I seem to have windows passing by on GRUB/Ubuntu. There's no Ubuntu folder under Windows. I can boot from firmware to Grub, then choose either OS. I removed Wubi/Ubuntu and reinstalled directly to the same partitions.
The windows Boot Manager did not create an entry for Ubuntu, so I need to create the entry. Wubi puts wubildr.mbr on my system... but this is the wrong thing for EFI installs. I need the shimx64.efi so the created Windows boot in EFI might work.
BCDEdit is the command-line utility that you can use to manage BCD stores on your computer. BCDEdit works similarly to Bootcfg.exe available on Windows XP systems, but with more options available and various improvements.
In WAIK, you can see different folders (ia64, amd64, x86) for different platforms, these folders contain basic WinPE.wim image files. When you mount WinPE.wim file using imagex, u can find bcdedit.exe in that mounted folder.
Issue: bcdedit.exe and Windows Setup Upgrade Tool cannot detect the Windows EFI partition (due to a missing ESP... it appears the MSR being in existence may not matter). This issue was not posted anywhere on the internet with googling the errors obtained. So I decided it was necessary to share here.
Windows 10 1809 Media Setup Upgrade tool, after all files are downloaded and the purple Windows 10 Setup screen is shown for Checking Compatability: "Sorry we are having trouble determining if you PC can run windows 10"
The issue was a missing ESP (EFI System Partition) since this Disk was GPT formatted, and as soon as it was created (even with no C:\EFI BCD boot files copied to it), both bcdedit.exe and the Windows 10 setup returned to normal functions. I didn't have one since I as cloned this over from an MBR formatted SSD and then used a tool like EaseUS to convert from MBR to GPT style by it rewriting the tables.
assign letter=z, and then browse to it with an elevated explorer tool. But it appears to not be necessary since bcdedit.exe "knows" my BCD store still in c:\EFI\Microsoft\Boot\BCD, which is excellent, in that I dont need to copy it over to the ESP and manage it there.
I suspect in BcdEdit.exe and the Win10 setup from an API call like [Nt]DeviceIoControlFile (as per what Process Monitor was showing), it is searching specifically for an ESP to determine if it has the correct disk, since it sees that this is GPT. When it cannot find it, it just stops.
You should make sure you run the script with administrative privileges. One of the ways is to compile your script, right click and "Run as administrator". Without administrative privileges you don't get access to bcdedit.exe utility.
Meteor can use bcdedit to delete different boot identifiers on a compromised host; it can also use vssadmin.exe delete shadows /all /quiet and C:\\Windows\\system32\\wbem\\wmic.exe shadowcopy delete.[40]
Prestige can delete the backup catalog from the target system using: c:\Windows\System32\wbadmin.exe delete catalog -quiet and can also delete volume shadow copies using: \Windows\System32\vssadmin.exe delete shadows /all /quiet.[43]
But the commands do not work in WinPE. I even tried it from G:\Windows\System32\bcdedit.exe, and I still get the same message.
I'd like to setup the windows bootloader so the vm will boot and I can create a second WSUS Server. I was thinking maybe I needed to do a runas, but since I'm in WinPE, what user would I run the command as? Also I found some documentation on bcdedit.exe Opens a new window but I'm new to GPT partitions and UEFI so I'm at a bit of a loss in how to proceed.
After finishing the guide I was not able to boot into Arch, because no boot menu was displayed. I figured this was an issue with the Acer laptop resetting the efi boot order on every reboot. So after researching a lot, I finally managed to boot into Arch by replacing the windows efi file (/boot/EFI/Microsoft/Boot/bootmgf4.efi) by the systemd-created file (after backing up the Windows file).
I tried several different approaches, I also followed the linked guide.
I tried it again now, double checking the paths and entered the following instruction on windows in a CMD with admin priviledges:
This blog post focuses on threat hunting methods and detections for a commonly observed technique used by Ransomware-as-a-Service (RaaS) operators. Such threat actors have often been observed altering boot loader configurations using the built-in Windows tool bcdedit.exe (Boot Configuration Data Edit) in order to:
Our research is building upon prior work by the Specter Ops researcher Michael Barclay, who published an in-depth blog about hunting for such activity on Windows 10. The bcdedit.exe commands that attackers use to modify boot configuration are below. Please note that other utilities such as the Windows System Configuration Utility (msconfig.exe) can also be used to modify the boot configuration data. However, alternatives will not be covered in this paper as they are not command line applications and thus cannot be used out of user interface access.
Prior research into these techniques mentioned that the registry keys storing these boot loader configuration items were Windows version specific, and only detailed detections that are valid for Windows 10. The way that we went about determining what those registry keys were for other Windows versions was to simply set up VMs running Windows 7, 8.1, and 11 respectively, and to run the three aforementioned bcdedit.exe commands while doing a capture with the Windows SysInternals tool Procmon. The logs generated by this tool are notoriously noisy, but it was easy to filter down to the relevant logs by adding two filters, one excluding any process not called bcdedit.exe, and the other excluding any operation that was not RegSetValue.
We are using Dell computers and they have a program (cctk.exe) that allows the BIOS to be manipulated from Windows (or PE in this case). During my troubleshooting I was running cctk.exe bootorder --bootlisttype=uefi that would list what the BIOS would have for boot options. bcdedit /enum firmware should have done the same thing. I noticed that after the image was deployed and all scripts ran, but before it restarted for the first time that the cctk command would show no boot options but bcdedit /enum firmware would show the correct options. Then I ran the cctk command again and suddenly it showed Windows Boot Manager as the first boot option. I then updated the Post Apply script to include that bcdedit command and everything worked as expected. Seems that this might be a Dell BIOS/Firmware issue where the BIOS doesnt know of any boot options but when bcdedit queries the BIOS/Firmware for its options the BIOS its able to locate them and then updates itself. Just a guess but its working for me now.
Additionally, bcdedit has many useful options, like copying an entry for pointing to another .VHDX that you just copied in your hard drive, etc. Just type bcdedit /? to check it out or see other options that I explain at the end of my old post: -a-windows-8-release-preview-master-vhd.aspx?wa=wsignin1.0
This question was asked in class the other day. BCDEDIT.exe will be used to add, delete or modify the boot configuration data store. To get the syntax on how to use the BCDEDIT.EXE command, type bcdedit /? at the command prompt.
When you use the Recovery Environment (Windows RE) to troubleshoot startup issues, first try the Startup Repair option in the System Recovery Options dialog box. If this does not resolve the issue, or if you have to manually troubleshoot additional issues, use the Bootrec.exe tool. This article talks about how to use the Bootrec.exe tool in the Windows RE to troubleshoot and repair the following items in Windows Vista or Windows 7:
An earlier Windows operating system was installed after Windows Vista or Windows 7 was installed. In this situation, the computer starts by using Windows NT Loader (NTLDR) instead of Windows Boot Manager (Bootmgr.exe).
This option scans all disks for installations that are compatible with Windows Vista or Windows 7. Additionally, it lets you select the installations that you want to add to the BCD store. Use this option when you must completely rebuild the BCD store.
Note Use the Bootrec.exe tool to troubleshoot a "Bootmgr Is Missing" error. If rebuilding the BCD store doesn't resolve the startup issue, you can export and delete the BCD store and then run this option again. By doing this, you make sure that the BCD store is completely rebuilt.
To do this, type the following commands at the Windows RE command prompt: