Restart your PC and enter the BIOS (usually by pressing F2, F12, or DEL) to set the USB drive as the primary boot device.
Modded versions like Ice Extreme v2 focus on two main goals: and modern compatibility on old hardware.
Because it is a "Lite" edition, its requirements are often lower than the Official Microsoft Requirements : 1 GHz or faster (32-bit or 64-bit). RAM: 512 MB (though 1 GB is recommended for stability).
It is highly recommended to perform a fresh installation (reformatting the partition) rather than an upgrade to ensure all performance tweaks work correctly.