Ok. One friend got **** disk 64-bit Win8 & installed. He liked Win8 so he went & bought genuine for laptop which was having Win7 OEM 32-bit 3 GB-Ram. 1 GB RAM failed so he got new 2 GB Ram. so total now is 2+2=4 GB Ram. But Win8 downloaded is 32-bit & is not recognising 4 GB Ram. Even full format & install doesnt work, shows only 3 GB. Laptop supports 64-bit. Windows helpline says buy DVD it will be ship with both 32 & 64 from which he can install. my question can he install from that *** 64-bit disk but instead of doing unofficial work, enter genuine key which he got when he install 32-bit. will it work. otherwise unwanted he needs to spend on dvd. also what if someone has genuine dvd & he installs using it and enters genuine key. will that work. friend wants to fix this ASAP. any help is good. thanks in advance.