Reinstall Windows 10 without CD/USB


First i am going to define that why you need to Reinstall Windows 10 If your Windows 10 operating system runs into a problem, it may slow down your computer even prevent the PC from working normally, what will you do to get rid of the issue?

Usually, your first choice is to search on the internet to find a solution. If you are lucky enough, you may successfully fix Windows issue. However, at most times, the problem may still exist even after trying all possible methods.

Then, the only effective solution is to reinstall Windows 10. Even, it is the last thing you have to do, which can make your PC go back to the normal working state.

However, Windows reinstallation may sacrifice your data and applications on your drive. Besides, you may think it is a bit difficult, especially when there is no CD or USB.

In the following part, I will tell you how to install Windows 10 in 2 cases: reinstall Windows 10 without CD or USB drive and reinstall Windows 10 from USB drive or with CD disc.

Reinstall Windows 10

Importance: Back up Important Files in Advance

Reinstalling Windows 10 may cause data loss. Thus, it is recommended to back up your important files before starting a reinstallation.

To keep your computer data safe, I suggest using the professional and free backup software for Windows 10/8/7, MiniTool ShadowMaker Free Edition, to back up files or folders with simple steps on the desktop or in WinPE.

When your PC can work, you can directly create a file backup on the desktop.

Step 1: Open MiniTool ShadowMaker to the following interface to choose one backup type. Here if you intend to back up data of the local computer, please click Connect in the left side.

Step 2: Go to the Backup window, click Source section, choose Folders and Files section, then you will see the following interface. Please choose the files or folders you want to back up and click O

Kto go on.

Next, you need to specify a location to save the backup image file. Relatively speaking, using an external hard drive or USB drive as the destination path is safer than the original disk.

Step 3: At last, hit Back up Now button to start the file backup.

If your computer fails to boot, you can use MiniTool ShadowMaker Bootable Edition.

Just create bootable media (CD/DVD or USB drive is available) with Media Builder feature of the Free Edition on a working PC. And then, boot the non-working PC from the disc or drive to get the Bootable Edition. Then, start to back up your important files.

Next, it’s your turn to reinstall Windows 10 to fix Windows issues.

Reinstall Windows 10 without CD or USB

① Reset This PC

Windows 10 comes with a feature called Reset This PC which can help you to choose to keep your personal files or remove them and then reinstall Windows. If your PC isn’t running well, just reset it.

The merit of this solution is that Windows won’t download any files to initiate the setup and you don’t have to employ installation media.

Step 1: To do this, please go to Start > Settings > Update & security > Recovery.

Step 2: And then, click Get started under Reset this PC section.

Note: If your system issues start after upgrading Windows 10, you can try a downgrade from a previous version or an earlier build instead of OS reinstallation. Under Recovery tab, click Get started under the respective option to go back your Windows to its previous installation.

Step 3: Choose an option to continue. To reinstall Windows 10 without losing data, you should choose Keep my files.

Step 4: After things get ready, a window will pop up, telling that your apps will be removed. Click Nextto go on.

Step 5: In Ready to reset this PC interface, click Reset button to start to reinstall Windows 10 without CD, no personal files loss.

When your computer isn’t running properly, how to reset it?

If the system fails to start up, please boot your PC several times, then Windows 10 may enter the WinRE.

Go to Choose an option > Troubleshoot > Reset this PC. And then, continue the operation by following the wizard.

②Reinstall Windows 10 without CD or USB Directly from ISO File

Microsoft provides you with media creation tool, enabling you to upgrade this PC to Windows 10, create installation media or directly use the ISO file to install Windows 10.

Here, if you don’t have an installation CD or USB flash drive, how to reinstall Windows 10 without losing data? Windows ISO file is recommended. Just follow the guide now.

Step 1: Download the media creation tool from Microsoft.

Step 2: Get Windows 10 ISO file.

    1. Open the downloaded tool, and choose Create installation media for another PC.

  1. Choose language, architecture (32 or 64-bit) and edition to continue.
  2. Check the ISO file option to create an installation ISO. Note that this tool requires you to burn the ISO to a DVD later.

Step 3: If you need to install Windows 10 directly from the ISO file without a USB drive or DVD, mount the ISO file. This also performs an upgrade of your current OS to Windows 10.

To mount the ISO file:

Find the ISO file and right-click it, select Properties.

Under the General tab, click Change, select Windows Explorer to open this file and click OK.

Right-click this file and choose Mount.

Double-click the ISO file to view the included files and double-click setup.exe to start Windows 10 setup.

Step 4: After the setup is ready, decide whether to download and install updates or not. Here, we suggest choosing the first option. These updates will help the installation go smoothly, and can include important fixes and updated device drivers.

Step 5: The setup will check for some available updates.

Step 6: Click the Accept button in the License terms screen.

Step 7: The setup will start looking for updates and downloading them.

Step 8: After everything is ready, you will see Ready to install screen where you can click the link labeled – Change what to keep.

Step 9: Then, three options are offered. If you need to reinstall Windows 10 without losing data and apps, please check Keep personal files, apps, and Windows settings.

Step 10: Then, this setup will go back to Ready to install screen, click Install button to begin the Windows 10 reinstallation. After finishing the reinstallation, follow the instructions to customize your settings.

③ Run Windows Setup from Partition Containing ISO File

Microsoft gives you another way to reinstall Windows 10 without CD or USB, that is to boot to Command Prompt and open Windows setup from the partition containing an ISO file. Note that this way can remove everything on your computer.

Use a System Image to Reinstall Windows 10

A system image includes all the Windows OS files, settings, programs and personal files. And it is a good option for you to restore Windows to a normal state.

To solve your system issues well, we strongly recommend you to back up your Windows OS and then perform a system image recovery to reinstall Windows 10.

To do this, the best free backup software – MiniTool ShadowMaker can be helpful for you. Just get it now to create a system image backup.

Step 1: After launching MiniTool ShadowMaker, choose local backup to start.

Step 2: Under the Backup tab, you see this freeware has selected system partitions as the backup source. Then, you only need to choose the hard drive of the non-working PC as the destination storage path.

Step 3: Finally, hit Back up Now to perform the backup operation.

In case Windows runs into a problem, use the system image file to restore your computer to its previous state.

And you are required to create bootable USB drive or disc using its Media Builder, then boot the crashed PC to use MiniTool ShadowMaker Bootable Edition to begin the recovery.

If you don’t have a system image backup, what should you do to restore the non-working PC? MiniTool ShadowMakerTrial Edition can be your good assistant since it offers you a feature called Universal Restore. Note that Free Edition doesn’t support universal restore.

Just get Trial Edition to back up the system of a working PC, restore the system image to the hard drive of the crashed PC and then start a universal restore.

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