Fix UEFI Boot: Fix for Windows 7, 8, 8.1, 10

Fix UEFI Boot in Windows 7

The step-by-step instructions for fixing the UEFI/EFI boot on a Windows 7 system are very similar to those of Windows 8/8.1:

• Use bootrec
• Use diskpart
• Use Easy Recovery Essentials

Windows 7 can’t be installed if your computer’s UEFI/EFI mode is set as active and not in Legacy mode. Legacy mode allows your computer to boot Windows 7.

If your computer model is new and has UEFI/EFI installed, but you have Windows 7 installed, it’s most likely that you’re running UEFI/EFI as Legacy.

Follow the instructions from prerequisites below before you start.

Prerequisites

Before you start using the bootrec or the diskpart command to fix the bootloader of your Windows 7 system, first you must determine that UEFI/EFI loads with the Legacy mode active.

Follow these steps:

1. Restart your computer
2. Press the necessary key to open UEFI/EFI. The key depends on your PC manufacturer and PC model.Most common keys are: F2, F8, F12, Del. Esc is also an option.
3. Once inside the UEFI/EFI setup menu, search for Secure Boot.This is usually found at any of the following tabs: Boot, Authentication or Security.
4. Make sure Secure Boot is either Disabled or Off
5. Save these settings and exit the UEFI/EFI setup menu

Secure Boot [Enabled] on a Dell computer

Fix #1: Use bootrec

To use the bootrec utility and fix the boot error of your Windows 7 system, follow these steps:

If you don’t have the Windows 7 installation CD/DVD to run Command Prompt, go to Fix UEFI Boot with Easy Recovery Essentials.

1. Insert the original Windows 7 installation CD/DVD and boot from it
2. Select a language, keyboard and click Next
3. Select the operating list (Windows 7) from the list and click Next
4. At the System Recovery Options screen, click Command Prompt
   
5. Type:

   bootrec /fixmbr

6. Press Enter
7. Type:

   bootrec /fixboot

8. Press Enter
9. Type:

   bootrec /ScanOs

10. Press Enter
11. Type:

    bootrec /rebuildBcd

12. Press Enter
13. Remove the installation CD/DVD, type exit, press Enter and restart your computer

Fix #2: Use bootsect

Follow these steps to run diskpart to repair the boot sector code of the Windows 7 installation:

1. Follow the steps from Fix #1: Use bootrec until you reach Command Prompt
2. Type:

   bootsect /nt60 SYS /mbr

3. Press Enter
4. Remove the Windows 7 installation CD/DVD from the disc tray, type exit in Command Prompt and press Enter
5. Restart your computer

Windows 7 bootsect utility results screen

Fix UEFI Boot in Windows 8, 8.1 or 10

To fix the UEFI bootloader on a Windows 8, Windows 8.1 or Windows 10 system, you can follow these options:

• Use diskpart to check if the UEFI partition has a drive letter assigned (if not, it must be assigned)
• Use Automatic Repair if diskpart doesn’t work
• Use Easy Recovery Essentials to automatically fix the UEFI bootloader

Fix #1: Use diskpart

If the UEFI partition on your computer doesn’t have a drive letter assigned, this may be the primary cause of your computer’s boot error.

A common is to use the diskpart utility (available on the Windows 8/8.1/10 recovery disc/USB) to make sure the UEFI partition has a letter assigned to it. If it doesn’t, you’ll assign it a letter.

The instructions you need to follow are:

1. Insert your original Windows 8/8.1/10 installation disc or installation USB
2. Boot from the disc or the USB
3. At the Install now screen, click Repair your computer or press R
   

   Windows 8 Repair Your Computer Menu
4. Click Troubleshoot
5. Click Advanced options
6. Click Command Prompt
7. When Command Prompt has finished loading, type:

   diskpart

8. Press Enter
9. The diskpart utility should now be loaded:

   DISKPART>

10. Type:

    sel disk 0

11. Press Enter
12. Wait for the confirmation message:

    Disk 0 is now the selected disk.

13. Type:

    list vol

14. Press Enter
15. diskpart will now show the full list of volumes available on your PC
    
16. Find the UEFI volume from the list. This usually has “BOOT” mentioned on the Label column, “System” on the Info column. The Fs column might FAT32 specified.For our example, in the next steps, our UEFI partition will be on Volume 2.
17. Type:

    sel vol 2

18. Press Enter
19. Type:

    assign letter=G:

    Where G: should be a unique drive letter. It can’t be already used, e.g. C:\, D:\
20. Press Enter
21. Wait for the confirmation message:

    DiskPart successfully assigned the drive letter or mount point.

22. Type:

    exit

23. Press Enter
24. Type:

    cd /d G:\EFI\Microsoft\Boot\

    Where G: is the drive letter you’ve assigned to your UEFI partition a few steps back. If the \EFI\Microsoft\Boot\ folder doesn’t exist (the error message will be “The system cannot find the path specified”), you can run the same command on alternative paths:

    cd /d G:\Boot\

    or

    cd /d G:\ESD\Windows\EFI\Microsoft\Boot\

    Remember to replace G: with the UEFI’s partition letter.
25. Type the bootrec command:

    bootrec /fixboot

    NOTE: on newer Windows 10 installs this command may return with an “Access Denied” error. On those versions the following command should be run:

    bcdboot C:\windows /s V: /f UEFI

26. Press Enter
27. For backup purposes, backup the BCD record of your computer like this:

    ren BCD BCD.bak

28. Recreate the BCD using the bcdboot command:

    Bcdboot C:\Windows /l en-us /s x: /f ALL

    Where C:\ is the letter of the drive where Windows 8, Windows 8.1 or Windows 10 is installed on. The /l en-us parameter is used for localization: US. You can use ln /en-gb for UK localization.
29. Press Enter
30. You can also run this command too:

    bootrec /rebuildbcd

31. Press Enter
32. Type exit in Command Prompt
33. Restart your computer
34. Your Windows 8/8.1/10 should now boot again

how to open gpedit when missing

1. paste this code in notepad and save it as .bat

@echo off
pushd "%~dp0"

dir /b %SystemRoot%\servicing\Packages\Microsoft-Windows-GroupPolicy-ClientExtensions-Package~3*.mum >List.txt
dir /b %SystemRoot%\servicing\Packages\Microsoft-Windows-GroupPolicy-ClientTools-Package~3*.mum >>List.txt

for /f %%i in ('findstr /i . List.txt 2^>nul') do dism /online /norestart /add-package:"%SystemRoot%\servicing\Packages\%%i"
pause

2. after tstep 1.run bat file then it will be fixed.

how to repair external hard drive using cmd chksdk

How to repair corrupted hard drive using cmd?

How to repair corrupted hard drive using cmd?
Repair corrupted hard drive with chkdsk command

Chkdsk command is used to scan the integrity of the file system and fix minor logical errors on a disk by fixing soft bad sectors or marking hard bad sectors so that they won't be used again. This command is helpful if you want to fix the corrupted disk without formatting.

Steps of running chkdsk command:

Step 1: Go to the start menu, type in cmd in the search bar.

Step 2: Right-click cmd. exe and choose Run as administrator.

Step 3: Run the following command in the Command Prompt.

chkdsk *: /f /r /x
You need to replace * with the drive letter you wish to repair. For example, you want to repair G drive, you need to type in chkdsk G: /f /r /x.

If your corrupted disk cannot be fixed by chckdsk command or chkdsk is not available for RAW disk, you will need to fix the corrupted/RAW disk using DiskPart.

Fix corrupted hard drive with diskpart command
DiskPart is a command-line built-in utility on Windows. It allows users to modify both internal and external partitions with command lines. If the hard drive is corrupted and becomes RAW, you can use diskpart command to convert RAW to NTFS/exFAT/FAT32. This command will forcedly format your corrupted hard drive and fix it at the same time.

Warning: The following steps will reformat the disk and make your previously stored data inaccessible, so make sure you have adequate backups or have recovered all important data before proceeding.

Follow the steps to fix corrupted hard disk using diskpart command:

Step 1: Click Start button.

Step 2: Type in diskpart in the search box.

Step 3: Right click on diskpart.exe and select Run as Administrator.

Step 4: Run the following command line to list all the available partitions and drives.

list volume
According to the listed disk/partition information, identify which drive/partition is corrupted and you want to fix. For example, scroll down to the picture below. In the picture, F is the target corrupted volume and becomes RAW, and its "Volume 6" in the list.

Fix raw partition or disk using DiskPart command

Step 5: Run the following command line. Be sure to choose the correct drive/partition and replace the volume number with your corrupted disk/partition.

select Volume 6
Step 6: Run command line:

format fs=ntfs quick
Note: If you want to format the disk to FAT32 using diskpart command, change the command line to format fs=fat32 quick.

Step 7: Run the following command line to close the command prompt after you have seen the message saying "DiskPart successfully formatted the volume".

exit

Windows Setup: Installing using GPT partition style

To manually wipe a drive and convert it to GPT:

Turn off the PC, and put in the Windows installation DVD or USB key.

Boot the PC to the DVD or USB key in UEFI mode. For more info, see Boot to UEFI Mode or Legacy BIOS mode.

From inside Windows Setup, press Shift+F10 to open a command prompt window.

Open the diskpart tool:

diskpart

*Identify the drive to reformat:

list disk

*Select the drive, and reformat it:

select disk <disk number>

clean

convert gpt or ntfs

exit

Close the command prompt window.

Continue the Windows Setup installation.

When choosing an installation type, select Custom. The drive will appear as a single area of unallocated space.

Select the unallocated space and click Next. Windows begins the installation.

How can I clear the Run history?

The Run history is stored in the registry in location 

as a series of values a-z. To delete an entry from the run menu perform the following:

1. Start the registry editor (regedit.exe)
2. Move to HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\RunMRU
3. Select the entry you wish to remove, e.g. h
4. Press the Del key (or select Edit - Delete) and click Yes to the confirmation
5. Double click the MRUList value and remove the letter you just deleted. Click OK to save the change
6. Close the registry editor

Pfsense boot loop fix

boot as single user mode after give the command in prompt /sbin/fsck -y -t ufs /

Resetting Your Forgotten Windows Password

Boot off the Windows disk and select the “Repair your computer” option from the lower left-hand corner

Follow through until you get to the option to open the Command Prompt, which you’ll want to select.

First you’ll want to type in the following command to backup the original sticky keys file:

copy c:\windows\system32\sethc.exe c:\

Then you’ll copy the command prompt executable (cmd.exe) over top of the sticky keys executable:

copy c:\windows\system32\cmd.exe c:\windows\system32\sethc.exe

Now you can reboot the PC.

Resetting the Password

Once you get to the login screen, hit the Shift key 5 times, and you’ll see an administrator mode command prompt.

Now to reset the password—just type the following command, replacing the username and password with the combination you want:

net user geek MyNewPassword

That’s all there is to it. Now you can login.

Of course, you’ll probably want to put the original sethc.exe file back, which you can do by rebooting into the installation CD, opening the command prompt, and copying the c:\sethc.exe file back to c:\windows\system32\sethc.exe.

 Reset Password with Command Prompt in Safe Mode

Windows 7 and earlier versions have a built-in hidden Administrator account which has no password by default. After forgetting the password to your regular account, you can access the built-in Administrator account in Safe Mode, and then reset your forgotten password with Command Prompt.

1. While starting the computer, hold down the F8 key until the Advanced Boot Options screen appears. Using the arrow keys to select "Safe Mode with Command Prompt" and press Enter.
   
2. You will see the hidden Administrator account available on the login screen. Once logging in, the system will automatically launch the Command Prompt with admin rights.
3. Run the following command and you can reset forgotten Windows 7 password in no time.

   net user username new_password

   

Note that this method doesn't work if the hidden Administrator account is disabled.

Reset Windows 7 Password Using the Utilman.exe Trick

This trick based on the substitution of the Utility Manager (Utilman.exe) program that can be used during logon screen with Command Prompt (cmd.exe), so you can access Command Prompt from the login screen and reset your Windows 7 password quickly. Follow these steps:

1. Boot your computer from Windows 7 installation disk. When the Install Windows screen appears, press SHIFT + F10 keys to open the Command Prompt.
2. Type in the following commands. Replace C: with the drive where your Windows 7 system was installed.

   C:
   cd windows\system32
   ren Utilman.exe Utilman.exe.bak
   copy cmd.exe Utilman.exe

   
3. That's all we need to do here. Close the Command Prompt and the Install Windows dialog to restart you computer.
   
4. Let the Windows 7 boots normally this time. At login screen click the Ease of Access icon, it will launch the Command Prompt window. You can then run the following command to reset your forgotten password.

   net user username new_password

   
5. Close the Command Prompt and you can use the new password to log in. Don't forget to restore the original Utilman.exe file back.