

When you tell Linux to use the entire disk. If you have not made a set of "Recovery DVD's" from your Windows install, I would also do that before you begin, in case you want to return to Windows later. Be sure to save anything important from your Windows drive before you start doing any of this stuff.

If things can go wrong, they probably will go wrong. If it doesn't work, try changing the Legacy mode setting. If all is good, use the Desktop icon to install Mint and when you get to the partition section, tell it to use the entire disk. Boot on your DVD/USB and make sure it works okay in "live mode". Set Secure Boot and Fastboot both OFF, but leave UEFI Boot set to ON (or else Legacy/CSM set to OFF). Get your Linux Mint 17.2 (64-bit only) ready to boot up on a DVD (if you have a drive for it) or on a USB stick. If you do NOT want to dual boot with Windows, and you DO want to put Linux ONLY on your laptop, that makes it easier. Many Linux distros need the Legacy mode ON to work. so if it is called that and it is ON, it is UEFI method, but if it is OFF, then it is the legacy method. Or sometimes this setting may be called "UEFI Boot". There is another UEFI setting to consider: "Legacy" mode, also referred to as "CSM". Fastboot should probably be off, since you mention that. Some will work with Secure Boot enabled, but most do not (not yet, anyway). Many Linux distros will install in UEFI systems, but sometimes different approaches are needed.
