I was installing windows 7 on a machine that already was installed an Operation system on C: drive.
And I planned to install the windows 7 on a new raw hard drive with Basic type partition.
When it asked for which disk for this installation, I got this error "unable to create a new system partition or locate an existing system partition" when I picked the new hard drive.
After I read a few threads on the internet, I found that "Disable C: drive boot up" in Bios, then it allowed me this installation again.
