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Summary :

HardOCP Community Forum for PC Hardware Enthusiasts. Download a media creation tool on the working PC; Run the media creation tool and select Create installation media for another PC and USB flash drive. You could directly burn the ISO file to the USB or disc. Plug the USB or disc into the non-working computer and change the boot order, so it can boot from the USB or disc.

Anything wrong with your Windows 10 could cause your PC to run slowly and even stop it from working properly. Want to fix your operating system by reinstalling Windows 10 without losing data? This post will walk you through how to reinstall Windows 10 without CD or USB drive, as well as how to reinstall Windows 10 from a USB drive or with CD easily.

Quick Navigation :

Reinstalling Windows 10 Is Necessary

If your Windows 10 operating system runs into a problem, it might slow down or even stop working normally. What will you do to solve this issue?

Usually, the first thing to do is to search on the internet for a solution. If you are lucky enough, you may successfully find a solution for your issues. Nevertheless, in often times the problem may still exist even after trying all the possible methods.

In that case, the only effective solution is to reinstall Windows 10. This may be your last resort to revert your PC back to the normal working state.

However, reinstalling Windows can sacrifice your data and applications on your drive. It could also be a bit difficult, especially when there is no CD or USB.

Can I reinstall Windows 10 for free without losing data? Certainly!

In the following sections, we will teach you the process of reinstalling Windows 10 both with and without a CD or USB drive.

How to reinstall Windows 10 without CD or USB drive
How to reinstall Windows 10 from USB drive or with CD disc.

How to Reinstall Windows 10 Without Losing Data

Important: Back up Important Files in Advance

How to reinstall Windows 10 without losing data?

As mentioned in the first part, 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, we suggest using the professional PC backup software for Windows 10/8/7, MiniTool ShadowMaker Trial Edition, to back up files or folders with simple steps on the desktop or in WinPE.

When your PC is working properly, you can directly create a file backup on the desktop

Step 1: Run MiniTool ShadowMaker.

Step 2: Go to the Backup window and enter the Source section.

Select the Folders and Files section, and choose the files or folders you want to back up and click OK.

Next, specify a location to save the backup image file. Using an external hard drive or USB drive as the destination path is relatively safer than the original disk.

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

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

Just create bootable media (using CD/DVD or USB drive) with Media Builder feature on a working PC, then boot the non-working PC from the disc or drive to get the Bootable Edition. After that, you can start backing up your important files.

PC is not booting but you want to back up files without booting to save them? This post will show you how to back up data from a computer that won’t boot.

Next, it's time to reinstall Windows 10 without losing data. In the following sections, you will learn how to reinstall Windows 10 without CD and how to reinstall Windows 10 with USB drive.

Case 1: Reinstall Windows 10 without CD or USB

Quick Video Guide:

① Reinstall Windows 10 While Keeping Files

Windows 10 comes with a feature called Reset This PC, using which you can either choose to keep your personal files or remove them and then reinstall Windows. Resetting is a good solution for a PC that isn't working well.

The merit of this solution is that Windows does not require any additional downloads nor installation media to initiate the setup.

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

Step 2: Click Get started under Reset this PC section.

Note: If your system encounter issues after upgrading Windows 10, you can try a downgrade from a previous version or an earlier build instead of the OS reinstallation. Under the Recovery tab, click Get started under the respective option to revert 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 the process has been prepared, a window will pop up saying that your apps will be removed. Click Next to go on.

Step 5: In Ready to reset this PC interface, click the Reset button to reinstall Windows 10 without CD or loss of personal files.

Tip:You Windows may freeze during the reset. To fix this issue, get the solutions in this post - Here Are Three Ways to Fix the Windows 10 Freezing at Reset Issue!

How to reset a computer that isn't working properly?

If the system fails to start up, how to reinstall Windows 10 from boot? Please boot your PC several times, then Windows 10 may enter the WinRE.

Msi Burn Recovery Download Software

Note: If Windows fails to go to WinRE, you might need to use a repair disc Repair your computer to enter 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 comes with a media creation tool that can upgrade this PC to Windows 10 by creating an installation media or directly using the ISO file to install Windows 10.

If you don't have an installation CD or USB flash drive, how to reinstall Windows 10 without losing data? Here, we will use the Windows ISO file.

Step 1:Download the media creation tool from Microsoft.

Step 2: Get the Windows 10 ISO file.

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

Tip:If you want to reinstall Windows 10 on a PC that already has Windows 10 activated, use the Upgrade this PC now option. This way you can help reinstall Windows 10 without losing data and programs.

2. Choose language, architecture (32 or 64-bit) and edition to continue.

3. Check the ISO file option to create an installation ISO. Note that this tool requires the ISO to be burned 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 rig