@Laela
Welcome, ClicShopping is not made to be used under Windows, I have not the time to make all verification inside the environment.
I think your computer is too slow to execute the process. You can update the execution time and increase the number.
Go to php.ini, edit and search this line :
;;;;;;;;;;;;;;;;;;;
; Resource Limits ;
;;;;;;;;;;;;;;;;;;;
; Maximum execution time of each script, in seconds
; http://php.net/max-execution-time
; Note: This directive is hardcoded to 0 for the CLI SAPI
max_execution_time = 30
for example, change by this
max_execution_time = 3000