By the way, the software can also turn them off if necessary.
All you need to do is to have the login details of the system you want to remotely start (typically, the admin password). On the contrary, the admin password is not mandatory if you're launching a setup version of the program.
You can download Wake-On-LAN from its official website for the Windows 32-bit and 64-bit platforms. You can also download its installation 50e0806aeb viejere