Error 0x800701b1 When Installing Windows

Error 0x800701b1 usually occurs when trying to install Windows on an external hard drive or while working with connected external devices like USB drives, external hard disks, or SSDs. This error indicates issues with the device's connection or compatibility. Here are several steps that may help resolve the issue:

1. Check the Connection

If you're using an external hard drive, USB drive, or SSD to install Windows, ensure that the device is properly connected to your computer. Try switching the USB port or cable, as the problem could be with the port or cable.

2. Check the Power Supply to the Device

Some external hard drives require more power than a standard USB port can provide. If this is the case, try connecting the device through a high-power USB port (e.g., on the back of your computer or via a powered USB hub).

3. Check the Disk for Errors

Perform a disk check for errors. To do this:

  • Open "This PC" (File Explorer).
  • Right-click on the drive you are trying to install Windows on and select "Properties".
  • Go to the "Tools" tab and click "Check".
  • Follow the instructions to scan and repair any disk errors.

4. Update the Drivers

Update the drivers for your external hard drive or USB device. You can do this via "Device Manager":

  • Press Win + X and choose "Device Manager".
  • Locate your device in the list, right-click it, and select "Update driver".

5. Check BIOS/UEFI Settings

If you're installing Windows on a new drive or external storage, check if the boot order is set correctly in the BIOS/UEFI:

  • Enter BIOS/UEFI during the startup process (usually by pressing F2, Del, or another key depending on your motherboard manufacturer).
  • Ensure the drive you're installing the system on is listed as the primary boot device.
  • Check if compatibility mode (Legacy/CSM) or UEFI mode is enabled depending on your Windows installation setup.

6. Try a Different Storage Device

In rare cases, the error could be related to the storage device itself. Try using another external hard drive or USB device for the installation.

7. Use Another USB Port or SATA Port

If you're installing the system on external storage through a USB port, try switching to another USB port. If it's an internal drive, ensure the SATA cable is properly connected and try using another SATA port on your motherboard.

8. Reformat the Drive

Sometimes the issue could be due to incorrect drive formatting. Try reformatting the drive to NTFS using Windows Disk Utility or third-party software.

If these steps don’t help, let me know what specific actions you've already tried, and I can suggest more targeted solutions.