If as Occom says you can download the setup program from Symantec, you'll be good to go. Otherwise you'll need the setup program.
Setup programs don't just copy files to your computer, they also make modifications to the Registry & often they'll add or update extensions to Windows.
That's why usually you can't just copy a program's folder from one hard drive to another & expect it to work.
Quote:I got a new computer a few weeks ago, and I had my old windows file copied onto my new one, since I had lost the disk.
That's not entirely accurate. What likely happened is that whoever set it up for you used their own installation media. They did not just make an image of your hard drive & move that over, coz first of all, in many cases that wouldn't work unless your new PC is using the same hardware as your old one, and besides, if that was what they did you'd still have all your old programs.
..I'm just mentioning that to help clarify that it's usually not possible to "copy & paste" a program onto a new computer.