I would like to use a unique way to use console on my windows setup. Previously I used putty for remote access to linux servers and cygwin to have unix-like tools on windows.
However, there is a strange behavior using vim when connected to the local console (using the puttycyg patch) : keys display A/B/C/D and replace the current character by these letter. In insert mode it does replace the caracter, in normal mode, no modification is made to the document even if the caracter is displayed as replaced.
For instance, when I type :
fixed bug with product deleted
I get :
fixed bbug wiwith prprodudueleteted
I have read a lot of questions about this type of issue 3,  and googled it but there is no answer that work for me.
The issue is present only for the setup kitty+puttycyg patch : cygwin alone works perfectly (and putty alone works also for access to linux servers).
Any help would be appreciated !
EDIT : I have tested without my usual vimrc. The result was different because there double insertion issue disappeared and I had issue with direction keys instead.
I could correct it with :
set term=builtin_ansi but I'd like to have my full vimrc.
I will try today to add options one by one to see which one isthe faultive.