If you have a retail or OEM disk, it is a bootable install disk which is not the same as an ISO image. Microsoft and their partners such as DigitalRiver allow downloading an ISO image which must be burned (not the same as copied) to a DVD before it can be used.
I purchased a Win7 Home Professional upgrade disc from Microsoft so I'm assuming that would only be usable on a system already running Windows? I actually have two issues. One is my Lenovo that just expired its warranty and when I bought it the OS is on its own partition but I don't know how to use it. I'd rather not do a new installation but I can get the system to allow access to anything device I plug in to the usb ports. It installs them and they show up in the device menu but I keep getting and error "not accessible" when I try to open them. If I open in safe mode I can get a device to open and restart then use it but if I take it out I have to go through the whole thing all over again. I called Lenovo before the warranty expired but they say its a software issue so not covered.
The other one I bought from ebay and the seller installed windows 7 ulitmate but the sticker on the machine is vista as well as the key. I'm trying to clean up some malware on it and if it turns out the win7 is not valid, I have no way to put vista back on it without any of the discs, right?
I gues my question is what do I need to use if I have to do a clean installation?