installing new patch will cause saves not working?

[Tomcon]

I play vanilla M2 and i dont jave patch 1.2 installed(no internet). If i download it and install manially will it cause my saves not working? Is it even worth downloading(well, main reason i want to install it is dumb AI and change logs say it got improved).

Or its like with Rome 2(which i got pre-ordered) where u had to make new campaign every week as new patch came out.

[♔atthias♔]

I play vanilla M2 and i dont jave patch 1.2 installed(no internet). If i download it and install manially will it cause my saves not working? Is it even worth downloading(well, main reason i want to install it is dumb AI and change logs say it got improved).

Or its like with Rome 2(which i got pre-ordered) where u had to make new campaign every week as new patch came out.

it will break you saves yes but it will fix also a ton off bugs
alternatively just buy the kingdoms expansion it will update MTW2 up to 1.3
and after that you have only to install the 1.5 patch for kingdoms