Hello, we have a dell 3510 laptop that no matter what we tried we were unable to install the Windows 7 64 bit enterprise edition. I worked with Dell on this and even they could not get it to work., We switched the BIOS from UEFI to Legacy and switched the RAIDon to AHCP and there was the third thing which I have a hard time recalling, I think it was boot off of CD, and the setting was set correctly. We spent hours trying to do this to no avail. I tried the DVD and USB, at one point it looked as if it was going to install the O/S but we got a box that came up asking us to search for Drivers, I was able to see the 'C" drive and the "X"
It asked to Load driver, but no matter what we tried, it did not work. Below is as far as I was able to get. I even ran the F6 Driver Utility and still it was a no-go.
I had another PC to try it with but when I switched from UEFI to Legacy it was as if there was no OS at all and I had to switch it back.
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