I would strongly advise against just deleting Windows until you are sure you want Linux, If you have a spared Hard Drive, I suggest you pull out the Hard drive with Windows on it and store it some place, Put in the spare Hard drive and install Linux on it.
And especially if the computer is under warranty. Unless a Linux OS is preinstalled, any warranty support is flushed down the toilet, should you require service while covered. Some OEM's doesn't even cover upgrading to later OS, in particular W10, even though it's free. This may be because there are no OEM supplied drivers for the new OS, there has been cases of UEFI 'semi-bricking' that takes skill to fix, and this isn't covered by the OEM warranty, though may be by an extended (3rd party) one.
I still have my original HDD that my main PC (XPS 8700 shown in sig) shipped with, in a box that another HDD arrived in with end caps to protect the drive. Should I require extended warranty service, all of my upgrades are coming out & the original reinstalled. This also helps the service center in diagnosing the computer. If out of warranty, it may also assist the end user, many ships with a suite of tests to run to check components.
Though once out of warranty, have an exact identical HDD (down to the model), though the one I'm currently running says 'Seagate' on the label & the original says 'Dell', otherwise are the same, checked before ordering, will try one of those RAID setups with the two HDD's when that time comes. It's something I've never done, and would like to try it to help me understand how this works, if for no other reason. This can allow me to assist others with RAID setups when I've had to turn down work because that's how their OS was running. With today's very low SSD prices, there's no need for this with two HDD's, though some also does the same with two identical SSD's. While this may produce more speed, the only real way to accomplish this is through an NVMe SSD.
As to your Linux Mint setup, it's important to create separate root & /home partitions, and a small Swap (most only needs 1024MiB) & it can be placed between root & /home. The reason for this is based on the same principle of why Windows users has Data partition(s) for their non-OS personal data of all types. It's very easy to reinstall an OS, it's the data that's not. In fact, it's preferable to keep an extra copy on a detachable external & remove as soon as transferred. For this reason, this is why we also have a /home partition.
If an older (pre Windows 8) computer with a BIOS, here's a simple Tutorial on how to install Linux Mint, the OS I've ran for over 7 years.
While it covers dual booting, if desired you can skip the parts pertaining to that & simply follow the Linux install procedure. Be sure to download the ISO that matches your computer's hardware, by that I mean if it's 64 bit hardware, then download the 64 bit ISO for install. There are some security features & others of your CPU that requires a 64 bit OS to take advantage of. If you don't have a ton of RAM, no worries, Linux MInt requires much less resources to run than any supported Windows OS. I've ran AV scans & still didn't use 1GB of RAM (around 700-800MB). And speaking of that, an AV is optional for Linux OS's, though after install & before updating (after reboot of OS install), enable the ufw Firewall by opening the Terminal, the black icon on the Panel towards the left, and type or copy/paste sudo ufw enable & provide your password at the prompt. It should then say that it's activated & will run at startup.
Good Luck with Linux Mint 18!