Reinstalled Vista accidentally on old harddisk
A day before I had installed a new motherboard on my computer. After that I powered it on to start and the system asked me for a boot up disk. Now instead of booting from hard disk, I accidentally put in my Vista CD in the CD Drive and booted it. Now, I have a fresh installation of vista and I saved all my other files on that disk drive in a file called OldPC.old
Now my problem is that I can copy files from OldPC.old to new vista but I can't use it. Can anyone help me on this?