for some reason im getting CTD when i walk in major cities at specific parts.
i enter windhelm (the eastern snowy city) and when im near the gate or the market the game is doing fine. but if i get closer to the palce of ulfric the game crashes to desktop.
rarely i can get into the palace but ocne i try and leave - CTD.
if i try to fast travel to whiterun i get CTD.

how would you advice me to see why the game crashes?

what sort of mods might cause the crash? (im using a LOT of mods and i havent added any new mods lately.

i was a doing a lot of outdoors roaming mostly and installed 1.6 patch. however i made a backup of the entire skyrim folder before installing and when i saw i get crashes with 1.6 i copied everything back and i can see in the game menu that i use 1.5.26 yet i still get the same crashes.
so MAYBE the crashes are not about the new update.... but maybe they ARE and i didnt manage to revert propery?....

any help?