Ok I find it !!!
For the VC++ trouble :
launch Open Server and shutdon't the updapte
Lauch again and click on flag and click on "First launch".
And you have to disconnect Avast for doing the guide.
Hi, thank you for for your guide.
But I'm in trouble, because the update of VC++ doesn't want to finish.
See : attach file...
1h left... It still stuck.
What can I do ?
thx.