Game Crashes in lot of situations

[Avariel]

Hello,

Since some days I got some crash problems.
When the game is running, sometims it suddently crash and I must reload it.
The crashes occured in 1.7 european version, but not in 1.64 from what I remember.

Here are the situations in which the game crash :
- Sometime when I want to change items on my heroes
- Sometimes in a fight

Do someone know this problem, and is it solvable ?
Must I do uninstall game and reinstall it without patching 1.7 version ?

Thanks by advance,
Avariel