Patch 4.19 Made my computer crash.

As patch 4.19 was just finishing up, the download froze and caused my computer to crash then going to a blue screen. The message said something along the lines of "Check computer for software / hardware issue." I uninstalled the game assuming my client was bugged, then re-installed it. I had the exact same thing occur, right back to the blue screen. My computer is now running slower and freezing occasionally. This is the first time that I have ever seen this message on my laptop. Can anyone help me out with this?