I have a new, formatted, and up-to-date laptop. It's clean of any infections and I'm sure of it.
The only change I've made is that I added a new 4G DDR3 RAM stick from my old laptop, and my new one has become infected with many viruses.
I know that a RAM stick is volatile (loses all its data when power is lost), thus I was confused by the infection.
PS: I also know my old laptop is infected and has multiple viruses.