I want to install an SSD in my Dell Inspiron 580 running Windows 7. I believe I can make it bootable, download Windows 7 and and install it on the SSD, giving it the product key from my current OS. This will leave all my programs and documents on the old hard drive, which is what I want. But another copy of Windows 7 will also remain on the old disk. Should I delete it to reclaim the space and avoid any confusion to the system? If so, how do I do that?