No, Win95 would be virtual machine that runs within W7 and only uses resources when you run VirtualBox, think of it as emulation but using a real installed os. Bets thing, if Win95 crashes and burns, it doesn't take W7 with it, you just delete the VM and create a new one. If you don't need network access for the games, just don't setup a lan connect and your 99% guaranteed virus free if you only use original games. If you need patches or updates, download them with W7 and then uses a share for Win95 to use them. Once you see it running, fairly straight forward to use.