You can't just put the file on the USB stick, the file is an image and you need an image tool. On Windows I use USB Image Tool
If you are running Windows Vista are later you need to run it as Administrator.
So the steps would be:
Plug USB Stick in
Run USB Image Tool as Administrator
Click Restore and find your image file
Wait for it to run and then eject the USB stick as per normal.
When you run this the USB stick will be wiped and all data lost so take care to backup any thing you want.
Two things I would like to mention:-
1)Try to use Win32diskimager tool(or any other) to write the software which you downloaded to pendrive.U cant directly copy the software & use
2)If the server is not able to detect USB instead of soft reboot,do the hard reboot,it will surely detect
I used rufus and it worked. Try rufus 2.2