I have been having laptop issues since some days. My laptop always sudden shuts down with no warnings and sometimes with weird screen, It happens to me every 1-2 minute after turning kn my laptop. If I remove my battery from motherboard and use it on Power, It'll still shut down.
There are a few things that could cause this that I know of:
Check the temperature of your PC and make sure it isn't overheating- I use Core Temp.
Check if it works in Safe Mode.
Check for viruses (I would use SUPERAntiSpyware or Malwarebytes for this).
Check if Event Viewer tells you anything about these occurences.
Make sure your drivers are up to date, and if they are, try rolling back the PC to before this started happening using System Restore. This one only applies if the issue doesn't occur while using Safe Mode.
Also, the "weird screen" - would that be a BSOD (Blue Screen)?