Is it safe to install any OS on Samsung UEFI Laptops ?
Short answer No
As far back as August 2012 in Launchpad Bugs reports began that installing Ubuntu could brick certain Samsung Laptops. Initially this was seen as an Ubuntu problem or perhaps a wider Linux issue. However, It has since become clear that this is not a problem with Linux or Ubuntu but a problem with the firmware in some Samsung Laptops.
A report by Matthew Garett shows that this is not limited to Linux but is possible in Windows too. The original belief was that the samsung-laptop driver was doing something that caused the system to stop working. However while changes have been made to mitigate this; and some people have successfully installed Ubuntu; it does not fix the problem. It just avoids one way of triggering it.
UEFI is supposed to make it easier to record information on system crashes but appears that this information is causing the problem. Microsoft have requested that there is 64KB available for this and the problem has been seen with 10KB or less of this space used so it likely that if if Windows crashes this will brick your laptop too.
Samsung laptops in the 300E5C, NP700Z5C, NP700Z7C and 530U3C series are affected and there may be others too as it would seem reasonable that Samsung will want to keep the firmware across its range of Laptops as similar as possible. For the moment I would assume that this bug exists in all there Laptops Using using UEFI. Samsung are working on a firmware update but this has yet to be released.
For now the advice has to be do not install any OS on a Samsung UEFI Laptop. However there does appear to be a work around by disabling UEFI but that will require you to re-install Windows 8 (if you want Windows on your machine) You should then be able to install Ubuntu or any other OS.