Yes w10 is bad use linux
cd Desktop
cd flasher
sudo ./flash.sh
Linux instructions above for flashing copy the flasher to your desktop and type the commands then Hold Button A if not B then power on you will then get some commands like below.You then finish the rest of the install on the rs90 device itself enjoy
Found Ingenic JZ4750 based device
Uploaded 1496 bytes at address 0x80000000
Waiting for stage1 bootloader to complete operation...
Stage1 bootloader did not return.
Detecting OpenDingux...
Found Ingenic JZ4750 based device
Uploaded 23687168 bytes
Uploaded 2858800 bytes
Uploaded 11065 bytes
Uploaded 7648 bytes
Uploaded 64392 bytes
Operation complete.