Fix Windows 10 Bootable USB Not Working in 4 Ways

A bootable USB is a media that contains system or system files and allows you to boot operating system from USB. With a bootable USB, you can upgrade Windows, reinstall Windows and repair Windows when it is stuck or even dead. However, it is disturbing when you have created a bootable USB, but you cannot boot Windows from USB drive. You may wonder why it happens and how to fix it. Here we will show the causes and some ways to fix Windows 10 bootable USB not working.

• Part 1: Why is Windows 10 Bootable USB Not Working
• Part 2: How to Fix Windows 10 Bootable USB Not Working
• Way 1: Format USB Drive into FAT32 File System
• Way 2: Create A New Bootable USB with Media Creation Tool
• Way 3: Set USB Drive as The First Boot Option
• Way 4: Enable CSM or Legacy Boot Mode, Disable Secure Boot Control

Part 1: Reasons Why Windows 10 Bootable USB Not Working

When it comes to the issue on Windows 10 bootable USB not working, the main reasons can be wrong boot mode or file system. There are 2 boot modes you can choose: UEFI and Legacy BIOS. UEFI supports FAT32 file system while Legacy BIOS supports NTFS file system. If your file system of USB is not supported by the boot mode, you can't boot from the USB. Actually, there are still some other reasons:

• Your USB is not really connected: USB is not completely plugged in, USB is damaged or USB port is broken. Thus, the USB can’t be detected by PC, which leads to the Windows bootable USB not working.
• Your USB is not supported: Your old version USB is not supported by Windows 10. Or your USB file system is not suitable for the boot mode.
• Your USB is created in error: There may be something wrong with your boot file on USB when creating bootable USB.
• Your USB is not recognized as the boot device: The first boot option in boot settings is your hard drive instead of USB drive. Thus, your Computer won’t boot from USB.

Part 2: How to Fix Windows 10 Bootable USB Not Working

Here to check if your USB is bootable or not in Windows. If you find your bootable USB not working, you need to figure out it is caused by USB drive problem or boot settings problem. Then follow the ways below to fix bootable USB not working.

Way 1: Format USB Drive into FAT32 File System

The computer in Legacy BIOS mode supports a USB drive with NTFS file system. While a computer in UEFI mode supports a USB drive with FAT32 file system. If you find the bootable USB not working, you can check if your USB is the supported format and set it to the compatible one as following steps. Before begin, keep your USB drive connected to PC.

Step 1: Press Windows key + E to enter the Windows File Explorer. Then right-click on the USB drive and choose Format.

Step 2: Select FAT32(Default) and click Start to format the USB file system into FAT32(Default). Since formatting will erase all data on your USB drive, you need to create a new bootable USB drive as way 2 shows.

Way 2: Create A Bootable USB Again Using Media Creation Tool

Sometimes, your bootable USB not working may be caused by the incorrect creation. You can try to format the USB and create a new bootable USB again. Here come the steps.

Step 1: Download Media Creation Tool and connect your USB drive to Computer.

Step 2: Double-click on Media Creation Tool file to run it. Then accept the license terms.

Step 3: Choose Create installation media (USB flash drive, DVD, or ISO file) for another PC, Then click Next.

Step 4: Choose USB flash drive as Create installation media. Wait until Windows media is created successfully, you have created a new bootable USB.

您可能也對另外 3 種建立 Windows 10 可啟動 USB 隨身碟的方法感興趣。

方法 3：將 USB 驅動器設定為啟動順序中的第一個驅動器

啟動順序是一個優先列表。如果您的 USB 隨身碟在啟動順序中位於硬碟之上，則電腦將首先嘗試從 USB 隨身碟啟動。因此，要修復可啟動 USB 驅動器無法運作的問題，您可以按照以下步驟將啟動優先級設定為 USB 驅動器。

第1步：將USB驅動器連接到PC。然後重新啟動電腦並按啟動選項鍵（例如Esc/F12/Delete）進入BIOS SETUP UTILITY。

步驟2：選擇啟動選項並輸入1st Drive。  然後選擇USB作為第一啟動選項。

第3步：儲存變更。然後再次嘗試從可啟動 USB 驅動器啟動。

方式 4：啟用 CSM 或傳統啟動模式，停用安全啟動控制

第1步：CSM可以提供對完全支援或不完全支援UEFI的系統的相容性。若要啟用它：選擇 啟動 選項 >;輸入啟動CSM >點選已啟用。

第 2 步：選擇UEFI/BIOS 啟動模式並保持啟動模式與您的可啟動 USB 相符。如果您有帶有FAT32檔案系統的可啟動驅動器，請選擇UEFI。 如果您有NTFS 檔案系統，請選擇舊版。

步驟 3：若要停用安全啟動控制，請輸入 安全 選項 >點選安全啟動控制。  然後將啟用切換為停用。

以上就是修復Windows 10可啟動USB無法運作的所有方法。大多數用戶可以透過格式化USB驅動器、建立新的可啟動USB並將啟動優先設定為USB驅動器來解決問題。希望它也能為你工作。

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