Update runtime files.
diff --git a/runtime/mswin.vim b/runtime/mswin.vim
index da869a9..5ec2149 100644
--- a/runtime/mswin.vim
+++ b/runtime/mswin.vim
@@ -57,10 +57,11 @@
" Use CTRL-Q to do what CTRL-V used to do
noremap <C-Q> <C-V>
-" Use CTRL-S for saving, also in Insert mode
+" Use CTRL-S for saving, also in Insert mode (<C-O> doesn't work well when
+" using completions).
noremap <C-S> :update<CR>
vnoremap <C-S> <C-C>:update<CR>
-inoremap <C-S> <C-O>:update<CR>
+inoremap <C-S> <Esc>:update<CR>gi
" For CTRL-V to work autoselect must be off.
" On Unix we have two selections, autoselect can be used.