OK, I put here as an answer.
This answer could be kind of work around for solving your latex plugin problem in windows vim. However if your question sticks to "getting error message before crashing" , it may not give you help. I don't have much experience with windows OS.
Latex Suite plugin uses python to generate some formatted text. It could bring better performance. However the plugin provides no-python ways for that as well, to let user without installing python runtime or with very old python version use the plugin too.
Since you mentioned that your problem was in python codes. You can try disabling python in that plugin, and test if the performance was acceptable.
The plugin provided a variable for that, you could add this line in your vimrc
let g:Tex_UsePython=0
Nice to see it helped.