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How to Make a Windows 10 Bootable Flashdisk to Reinstall

How to Make a Windows 10 Bootable Flashdisk to Reinstall, Flashdisk can be used as bootable media to install Windows 10. The word "bootable" means

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Flashdisk can be used as bootable media to install Windows 10. The word "bootable" means that the computer can boot by loading the files in the flashdisk, in this case the file is the Windows 10 installer.

Although bootable media can be made with other storage devices such as external hardisk or DVDinstall Windows 10 using a Flashdisk is indeed a more practical choice. Because Flashdisks are easy to get and most people already have them.

There are two ways that can be used to make a bootable flashdisk, namely using an application and without an application. On this occasion we will discuss them one by one, later you just have to choose which method you want to use.


Before starting, prepare a flashdisk with the following criteria:
  • Minimum flashdisk capacity is 8GB.
  • Try not to have other files in it. If there is, first backup, to another place.
  • Flashdisk in normal condition.
You also must have a Windows 10 ISO file that you want to use as an installer. If you don't have it, please download it first from the Microsoft website, you can see the method here: Download the Windows 10 ISO

Create a Windows 10 bootable flashdisk with the Rufus application

Follow these steps:

1. Download the Rufus application

In this first method, we will use the Rufus application to make Windows 10 bootable. Rufus is a quite powerful application with high compatibility support.

This application is most widely used to convert ISO files into installers into media such as DVDs and Flashdisks. Rufus is also an open source application so it can be used for free.

You can get the application via the following link:

2. Insert the Flashdisk into your laptop or PC

The second step is to insert the Flashdisk into the laptop or PC that you are using. Check again and make sure the Flashdisk has been detected normally.

3. Run the Rufus application

The next step is to run the Rufus application that has been installed, if you are using the portable version, then you don't need to install it and just run.

The Rufus application display will look like the image below:


4. Select Device to be Flashdisk

In the Rufus application, pay attention to the Device menu. Click on the menu, then selects your Flashdisk.


5. Enter the Windows 10 ISO

Then click the SELECT button in the Boot selection section, then select the Windows 10 ISO file that you downloaded.


6. Select the partition type and target system

Rufus can only be used to create bootable media with one boot option. So at this stage you have to choose which partition type and target system to use.

There are two choices, namely MBR for Legacy BIOS, users, and GPT for UEFI users.


If you're still not sure which one to use then take a quick look at this tutorial to check it: How to check BIOS or UEFI

After knowing the type of system to be used, set the options on Rufus.

If your laptop uses UEFI then in the Partition scheme select GPT. In the Target system section will automatically change to UEFI (non CSM).

If your laptop still uses the BIOS, then in the Partition scheme section, select MB in the Target system section, it will automatically change  the BIOS (or UEFI-CSM).

7. Set the Format options

Next look at the section under the Format options label.

First, you can name the Volume label as you wish, for example Win10_64bit or something like that. This volume label will be the name of your Flashdisk when it is finished being converted to bootable Windows 10.

In the File system option, select NTFS.

In the Cluster size, leave it as Default.


Click Show advanced format options, then check the Quick format option and Create extended label and icon files.


8. Start the Windows 10 bootable flashdisk creation process

After all the steps above have been set, click the START button to start the process => then click OK.

Wait until the process is 100% complete, you can see the running process indicator at the bottom of the Rufus application.


Creating a Windows 10 bootable flashdisk with cmd (without software)

As an alternative method, we can also make a bootable flashdisk without using software. What we need to do is change the type of Flashdisk partition and enter the Windows 10 installer file that has been extracted then run a few commands in cmd.

Follow these steps:

1. Extract the Windows 10 ISO file

The first step is to extract the downloaded Windows 10 ISO file. To do this you will need an archiver application like 7zip or WinRAR.

The trick is to right click on the ISO file => select Ekstract to.


2. Change the Flashdisk partition to NTFS

The second step is to change the file system type on the Flashdisk partition to NTFS. To do this you can use the Disk Management program that is in Windows.

The steps are:

Insert the Flashdisk into the laptop, then open the Disk Management program.

Right click on the Flashdisk partition, then selects Format.


In the Volume label, name as desired. Then in the File system select NTFS. The rest, just leave it in the default state, finally click OK.


In the Disk Management program you will see that the Flashdisk has changed to NTFS.


3. Change the Flashdisk to be the active partition

Next we will change the type of Flashdisk partition to an active partition.

First open a Command Prompt with administrator access, by clicking on the Windows key => type cmd => select Run as administrator.


In the Command Prompt, type the command: diskpart => press enter.

Then type the command again: list disk => press enter.


You will see a list of the disks present in your laptop or PC. Note what disk number is your Flashdisk. In the example above, the Flashdisk is on Disk 2.

Then type the command again: select disk 2 => press enter.

Note: number 2 must be replaced with the disk number on your Flashdisk.

If done correctly, it will say Disk 2 is now the selected disk.


Then type the command again: select partition 1 => press enter.

Finally, type the command: active => press enter.

If successful, a description of Diskpart marked the current partition as active will appear.


Now you go back to Disk Management and look at the Flashdisk partition, there you will see the Flashdisk partition has changed to active.

On the Flashdisk, you will see a description of the Healty (Active, Primary Partition).


4. Copy the extracted ISO file into the Flashdisk

After the Flashdisk partition has been successfully converted into active, then you copy all the extracted ISO files into the Flashdisk.

5. Rename the BOOTMGR file to NTLDR on the Flashdisk

Enter the Flashdisk then find the file called bootmgr. Right click on the file => select Rename => rename it to ntldr.

At this point, your Flashdisk is ready to be used as a bootable Windows 10.


6. Check whether the flashdisk can be used for booting

Finally, you can test whether the bootable flashdisk can be used for booting. Restart the laptop, then change the bootable media in the BIOS / UEFI menu to a Flashdisk.

If successful then you will enter the Windows 10 installer.

To enter the BIOS / UEFI, you do this by pressing a certain key on the keyboard, here is a list of keys to enter the BIOS menu on each brand of laptop and motherboard:

BrandKeyboard button
AcerF2, Del
ASRockF2, Del
AsusF2, Del
DellF2, F12
Gigabyte (Aorus)F2, Del
HPEsc, F10
LenovoF2, Fn + F2
Lenovo DesktopF1
Lenovo ThinkPadEnter + F1
Microsoft SurfacePress + hold the volume up button
Origin PCF2
SonyF1, F2, F3
This is the tutorial on how to make a Windows 10 bootable flashdisk that we can provide. Good luck and good luck.