The SSD should have come with a dumbed down version of backup software, like Acronis, that you can download and get licensed. Use this to create a duplicate of your hard drive in the computer and onto the SSD. Ensure you copy EVERYTHING, formats, MBR, partitioning, data, EVERYTHING (you may have to boot off of removable media in order to do so, so be sure you have a disk or thumb drive ready).
After that you must take the old hard drive from your system (carefully power down, disconnect all power, and carefully remove while using an anti-static strap!) and put the new one in the same slot. If your computer can hold two hard drives, do NOT use the second hard drive bay yet.
Power the computer on. If the copy was done correctly it will boot up as if nothing happened, if not then you will need to put the original drive back in and try again. Once you confirm that the hard drive is running properly and operates the computer, then you can power down and add the original drive in the second bay if there was one.
There are many free tools that can help you. Personally I do not like Acronis b/c it occasionally misses the MBR. However the sheer number of tools that can help are all up for personal preference, and as long as it functions even the most simplistic software works great.
-- Windows 7 Ultimate on custom built system, Windows 10 on under powered laptop. Sophos UTM 9, Ubuntu Server and Windows Server 2008 R2. HyperV Virtualization --
"The hottest places in hell are reserved for those who in a period of moral crisis maintain their neutrality," John F. Kennedy