My issue is horrible and simple :
On my old pc : the software works perfectly, on my laptop, when i click on the render as button -> Crash like this dude 
I disabled NVIDIA OPTIMUS, uninstalled reinstalled .NET FRAMEWORK
Reinstalled sony vegas (naturally).
I did everything. Help me please
Update first your VEGAS Pro 18 (from MAGIX) to the last build.
A FAQ that you could inspect here.
And please note that VEGAS Pro 18 is not "Sony Vegas".
Reinstalled sony vegas (naturally).
You therefore must have Sony Vegas Pro 13 or earlier because version 13 was the last ever Vegas Pro version released by Sony. Please see this forum post.
Assuming that you have a legally purchased version of Vegas Pro - probably 18 given the video that you've uploaded - please see the following link and provide the requested information particularly that listed under sections B and C: https://www.vegascreativesoftware.info/us/forum/important-information-required-to-help-you--110457/
Also useful will be a screen shot of the error window that pops up with the details checkbox checked.