I want to install it on my old computer which is currently without an OS. Is there any way to use a flash drive to install it? I have another computer up and running. Is it possible to use that to install it?
What OS are you looking at? With win7, make an ISO image of the disc with ImgBurn and then use the Windows 7 Download tool to put it on a 4GB+ thumb drive. For XP, try something like this: http://www.techtipsgeek.com/install-windows-from-usb-flash-pen-drive/559/