You're talking about the RAID controller RS2WG160 right? What's the exact error message you're getting?
To update in Windows, unzip the CmdTool2.exe or CmdTool2_64.exe (for 64-bit OS) and the rom file into the same directory, and run the following command:
cmdtool2 -adpfwflash -f 2108_p35.rom -aall
Edward, i already solved the problem, installing the windows and updating via the software, thanks for the help.