In order to get meaningful assistance from this website you need to provide as much information as possible. For instance:
Does Lightroom start at all?
Are you able to use Lightroom at all before it crashes?
What operating system are you using?
How much RAM does your computer have?
Is there any pattern to when Lightroom crashes?
With no information provided by you, the only suggestion I can make is that you turn off GPU acceleration in your Lightroom preferences and see if that helps. Otherwise, please provide meaningful information that might give us a clue as to where to begin helping you.