I bought a very old cpu on Shopee that is worth over 3k pesos last November 2021. And the unit already has a Windows 10 installed on it. Even though I already disabled the automatic update, my Windows 10 updated to a newer or higher version of Windows 10 and my pc became laggy.

I tried to clean and delete big files, apps, and games but still it lags a lot. So I decided to reformat my pc. Upon making a USB bootable Windows 10 installer, it won't allow me to boot in my USB device to reinstall Windows. I used rufus to make a bootable usb. Rufus is a very popular program for making bootable usb but this program failed me. I researched and watch so many videos but none of them worked.

I even modified my BIOS settings, reset it to its factory default settings but still my pc won't read my usb bootable device. There is no legacy, uefi option found in the BIOS also. I tried different format for my usb, thus, ntfs and fat32 but none really worked. Follow the steps below to be able to make your usb bootable.

USB Bootable device will run in Ubuntu but not in Windows 10

1. First you need to format it to NTFS using command prompt. Open your command prompt. Type diskpart and press ENTER.

2. Type list disk and press ENTER.

3. All detected disks will be displayed with detailed information. Check carefully which disk is your USB drive. You may identify the USB by checking the size and name.

4. Now type select disk number of your USB, e.g. 0, 1, 2, 3 and so on. If it is number 2 type select disk 2 and press ENTER.

5. Then, type clean and press ENTER.

6. Type format fs=ntfs quick to start formatting your USB to NTFS and press ENTER.

7. When done formatting, find your Windows 10 iso file. Right-click the iso file and press Mount.

8. Manually copy all the contents of the iso file to your USB device.

9. When done copying, you can now try to boot again using your USB bootable device and it will definitely boot your Windows 10 installer now.

10. Done!