Louismccut,   Would you do me a favor and confirm some things for me, in order to isolate the issue?   Make sure you're logged into an admin account, you can check this with the command "show users". (Role should be sysadmin, privilege level 15)   Ensure that you used 7zip to extract the .bin from the .tar     Is the .bin shown in the image directory?  You can check with "dir image"    Is this a VLT environment?      On a side note, USB is typically a little faster in my experience, so it's my preference if available. If you do go with USB, make sure it's formatted FAT32 first, you can format the USB using the native Window format tool as long as it's under 32GB flash drive, then move the .bin file to the USB.   Let me know.    
I'm installing our first S4148T and am having issues trying to upgrade OS10 from 10.4.3.4 to the latest in our digital locker 10.5.1.3.  I place the .bin on an TFTP server and am able to complete image download successfully.  However when I try to do image install, it begins but then fails with a state detail of Failed: Operation not permitted. I have tried to install from image:// and tftp:// with the same results. Seems like I'm missing something easy.  Next up will be to try the upgrade via a USB drive but I'm not clear why what I'm doing won't work.
OS10 upgrade