How to Make a Bootable Flashdisk from an ISO File

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How to Make a Bootable Flashdisk from an ISO File

You may now need a media for reinstalling Windows 10, 7, 8, or 8.1. The only media that you can use is a bootable (or DVD) flash disk that contains the extract of ISO files from Windows 10, 7, or 8.1 that you want to install.

But, how do you get the bootable flash disk?

To get a bootable flash disk for reinstalling, you must make the bootable flash disk itself. Doing reinstall Windows with the flash is very useful for those who do not have to reinstall Windows DVD.

# 1 Before Making Bootable Alone, You Need to Have an ISO File

To make bootable, we need Windows installation files that have been wrapped in a one.ISO format file. We can download ISO files for free, legal, and official directly from the Microsoft site.

Assume you have downloaded the ISO file from the version of Windows that you want to reinstall. Now, you can easily make your own bootable flash disk.

There are various ways to make a bootable flash disk. You can use additional software such as Rufus, use CMD, or just use the extract method or mount the ISO file directly to the flash without software.

# 2 How to Make a Bootable Flashdisk with Rufus

Rufus is one of the applications or software that can help us make bootable. Rufus is considered the best because it has a file size that is lightweight, easy to use, and portable (without installation setup).

While waiting for the download process, plug in and connect the flash disk to the computer/laptop/ PC. The flash disk must have a minimum capacity of 4GB in order to accommodate the ISO file that you have downloaded.

It should be noted, the process of making a bootable flashdisk requires that the flashdisk be formatted. Before opening Rufus, you need to backup data from the flashdisk or save it to another partition on the computer.

After downloading Rufus, open with administrator access by right-clicking Rufus and selecting Run as administrator.

Select Yes.

How to Make a Bootable Flashdisk from an ISO File

After the Rufus application or software opens, you will see the name of the flash disk and its capacity in the Device box. If you want to replace the flash disk or other devices as an installation media, click on the box and select another flash disk.

How to Make a Bootable Flashdisk from an ISO File

On the File system, select NTFS. In the Cluster size, select Default only. Also in the Partition scheme and target system type and in Format options, just follow the picture above.

Suppose you have set the settings for Rufus. Now, you need to enter the ISO file that you downloaded into Rufus which will then make bootable from ISO for the flash disk.

To insert an ISO file, select the tooltip button Click to select an image to the right of the ISO image.

Then look for the ISO file that you have downloaded and select Open.

How to Make a Bootable Flashdisk from an ISO File

So, Rufus will scan the ISO file to be inserted into a flash disk to be bootable.

How to Make a Bootable Flashdisk from an ISO File

Immediately, Rufus will display the READY status if the scan process is successful. Now, you can start the process of making a bootable flash disk with the ISO file you just selected.

How to Make a Bootable Flashdisk from an ISO File

To start creating a bootable flash disk, click Start.

Click OK to confirm.

How to Make a Bootable Flashdisk from an ISO File

Again, the process of making a bootable flash disk requires flash disk to be formatted. Rufus will extract and insert all extract files from the ISO file into the flash disk and make it bootable.

How to Make a Bootable Flashdisk from an ISO File

This process can take 10 minutes, 20 minutes, one hour – depending on the specifications of the computer/laptop and the speed of the flash disk in reading the data.

After the bootable creation process is complete, the progress bar will change to full green with the READY status below it.

How to Make a Bootable Flashdisk from an ISO File

And, BOOM! You have successfully made a bootable USB flash disk from an ISO file on Windows 10, 7, 8, or 8.1 using additional software Rufus.

How to Make a Bootable Flashdisk from an ISO File

There are still other ways to make bootable, namely by manual or without any additional software, but with the help of CMD.

# 3 How to Make Bootable Flashdisk Without Software (CMD Only)

Windows has a crucial Command Prompt (CMD) feature that we can use to make a bootable flash disk.

Besides CMD, we also need the Mount feature available on Windows 8, Windows 8.1, and Windows 10. This Mount feature only serves to “dismantle” the ISO file so that you can copy the entire contents of the ISO file to the flash disk.

For Windows 7 users, just use an application such as WinRAR or 7Zip to extract the ISO file and copy the entire ISO file to the flash disk.

Before entering the entire contents of the ISO file into the flash disk, format the flash disk first.

How to Make a Bootable Flashdisk from an ISO File

Select the  NTFS File system  . Select Format to format.

How to Make a Bootable Flashdisk from an ISO File

Click Yes to format.

bootable

So, the format process is executed.

How to Make a Bootable Flashdisk from an ISO File

After the format process is successful, you can simply mount or extract the ISO file and insert all the files from it into the flash disk.

How to Make a Bootable Flashdisk from an ISO File

Right-click the ISO file and select Mount for Windows 8, Windows 8.1, and Windows 10. Then copy the entire file that has been mounted to the flash disk.

For Windows 7 users, right-click the ISO file and select the application name> Extract files. Because I use 7Zip, I right-click the ISO> 7Zip> Extract files.

How to Make a Bootable Flashdisk from an ISO File

Select the (…) or Browse button or the like to select the destination flash disk.

How to Make a Bootable Flashdisk from an ISO File

Select the destination flash disk. Select OK.

How to Make a Bootable Flashdisk from an ISO File

Select OK to start extracting the ISO file to the flash disk.

How to Make a Bootable Flashdisk from an ISO File

Manually booting a flash disk can take longer. Just wait until it’s finished patiently.

How to Make a Bootable Flashdisk from an ISO File

When finished, the flash disk is filled with all the contents of the ISO file that has been extracted. Now, you must make the flash disk bootable which will be able to install Windows when booting.

How to Make a Bootable Flashdisk from an ISO File

To make the flash disk bootable, open disk part via the Start menu search box. Type disk part, and select it in the search results.

How to Make a Bootable Flashdisk from an ISO File

Click Yes on UAC.

Wait a minute. You will see the Command Prompt in another form.

How to Make a Bootable Flashdisk from an ISO File

When loading is complete, immediately type the disk list and press Enter. This will display the entire list of disks that are currently connected to the computer based on numbers such as Disk 0, Disk 1, etc.

How to Make a Bootable Flashdisk from an ISO File

Make sure you know what number your flash disk is detected there. Just pay attention to its capacity to make it easier. In the example of this tutorial, my flash disk has a capacity of 7373MB, which means that my flash disk is Disk 1.

Then type select disk number and press Enter. Because my flash disk is Disk 1 here, then I type select disk 1 and press Enter.

How to Make a Bootable Flashdisk from an ISO File

Then, type select partition numbers again and press Enter. Here, I type select partition 1 and press Enter.

How to Make a Bootable Flashdisk from an ISO File

Finally, type active and press Enter. This will make the flash disk bootable, so it can install when the PC / laptop boots.

How to Make a Bootable Flashdisk from an ISO File

Then close CMD.

But, all this is not finished. You need to do the next steps.

Open CMD and run as administrator.

How to Make a Bootable Flashdisk from an ISO File

Then type the flash disk address letter. Here, the flash disk that I use has the address letter G:, then I type g: and press Enter.

How to Make a Bootable Flashdisk from an ISO File

How to Make a Bootable Flashdisk from an ISO File

Then, type cd \ boot and press Enter.

How to Make a Bootable Flashdisk from an ISO File

Then type bootsect / nt60 LETTER: / mbr and press Enter. Here, I use the bootsect code / nt60 g: / mbr .

How to Make a Bootable Flashdisk from an ISO File

Wait a minute. When the Bootcode entry was successfully …, it means the flash drive has completely changed to bootable.

How to Make a Bootable Flashdisk from an ISO File

You have successfully made a bootable flash disk with software and without software or only with the help of CMD on Windows 10, 7, 8, and 8.1.

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