It said do I want to put it on the same partition or do a new install [I think]. I picked the new install. It said not to put 2 OS on the same PC. I didn't see any other option at the time. How can I undo it?? I can't get back my old software or files or data. I believe it's still on my hard drive because it says I have only 17 GB left out of 40 GB. Please help. Thanks.