Looked into this a lot more, and it seems that one of the signs of a failing SSD is the failed boot and you need to ctrl alt del to restart your PC.
Downloaded the San Disk SSD Dashboard (Link to the page where you can download their software) click here and it shows that it is 100% working and still has 96% durability left. I have emailed San Disk and awaiting a response from them.
In the mean time I have purchased a new SSD so will update either from a reply from San Disk or after I have my new SSD.
Hopefully this is the problem with my computer. If anyone has anything to add, would love to hear your thoughts.
Have a nice day