"Upgrading your hard drive or RAM does not, in itself, void the warranty. However, any damages caused by the upgraded equipment, or damages incurred during the removal of the old hardware or installation of the new hardware are not covered, nor is the upgraded hardware covered by the Acer warranty.
While it is generally true that upgrading your computer will not void the warranty, some products carry a seal that voids the warranty if broken. That means you should avoid breaking that seal for any reason, even if you are doing it only for upgrade purposes."
P.S. Per gli Asus è diverso, qualunque modifica o upgrade tu faccia annulla la garanzia. Sugli Asus solo il personale autorizzato può fare questo tipo di operazione :asd: