Problem:
The new Windows 10 Anniversary Edition (version 1607) is not honoring the old FAT12 systems with no partition table disks. LPC products with mass storage USB ISP implement MBR + FAT12 with root directory entries only. Due to this, the OS is not able to recognize the virtual files system presented by the LPC mass storage ISP. Hence the new OS ask the user to format the disk with assumption it is a portable media.
Workaround:
Until Microsoft resolves the issue, an alternative is to use raw disk image writer tools such as a Win32 Disk Imager to write firmware file to the device.
Here are the steps:
Original Attachment has been moved to: header_crp_disabled.bin.zip
Microsoft has released the update to Windows 10 version 1607 which fixes this problem. Please download the update (KB3176934) from Microsoft website