Hello,If you can login to the switch with the admin account, you simply need to do the following:SLX# conf
Entering configuration mode terminal
SLX(config)# root enable
% Info: Root password is at system default, for better security, you may want to ...
The FWDL command simply needs to be pointed to the directory containing all those SWBD folders.You also used "\nos7.4.2.1j" which is not valid. I would remove the backslash and use the correct folder name: "nos7.4.1j"
