I tried to install Ubuntu 14.04 to dual boot on this Windows 7 64 bit laptop, but it didn't recognise Windows. Last week this machine failed to boot in Windows and all the Samsung Recovery options failed, and I didn't have a system disc, so I downloaded Windows 7 from the official digitalriver site, and managed to install it OK. From reading other threads it looks like that may be why it's not being recognised.
I just managed to install boot-repair and was given the following URL to share on the forum: http://paste.ubuntu.com/7409913/
Thanks for your help,
Andrew
P.S. I wouldn't mind too much using the BIOS to dual boot. There's 500GB altogether, and 250GB free space. Could I just install Ubuntu there, and then set the BIOS to boot to Windows or Ubuntu?