Aall three above points are matched with my machine....the problem is that after I boot win7 32bit and 64bit(dual) ISO from virtual box (followed all the required steps to make a virtual disk in Virtual Box), selected "64bit" option to install in virtual box, it pops up a message:
select driver to install
After selecting the "Browse" option to load pre-os driver it can't access my local hard disk for the driver location. I have downloaded pre-os driver from Dell official website.
I'm not able to go further steps.
My system type is: 32bit operating system of win8.1, having 64bit processor. Dell Latittude E5520, 2GB of RAM.