Corresponding to your description, I guess you got first messages checking prerequisites.
Was there only green messages or did you get pink or red message ?

Hi,

Thanks for your quick answer.
I tried to check all prerequisites (i modified max_input_vars=1000 is too small to 4000 in php.ini before installation but still the message.. :blink: )

Here the details :
PHP version is 5.4.24 : OK
Module PDO is available : OK
Module PDO for 'MYSQL' is available : OK
Module MYSQL is available : OK
Module MYSQLi is available : OK
Module MBSTRING is available : OK
GD Library is available and correctly installed : OK
Module IMAP is not available - impossible to configure ProjeQtOr to retreive notes from received emails
Module OPENSSL is not available - impossible to configure secured access to email server
Module XML is available : OK
max_input_vars=1000 is too small - value should be at least 2000, 4000 recommended - check your php configuration (php.ini)
max_execution_time=30 : OK
memory_limit=128M : OK
file_uploads=1 : OK
session.auto_start is disabled : OK
magic_quotes_gpc is disabled : OK
register_globals is disabled : OK
Database 'projeqtor' already exists : OK
Parameters are saved.

OpenSSL is missing in PHP configuration.
Try and install it. I'm not sure it is the point that may be blocking, but it's worth the try (connexion requires some encryption)
NB : to have your max_input_vars taken into account, restart PHP.

I done a new installation of wampserver and Projeqtor and i checked every prerequisites... and all is good now.
Thanks a lot for your help.