yes, i've read all you wrote.
(thank krit86lr for your understanding)
i use ccleaner with all options ON !
each time i use it, it deletes all restore points and the last too ! am i alone with this problem ?
my hard drives are free (more than 30 Go) and i do the experience to launch a cleaning, then i see my list of restore points and all disapear. i create a new point, i launch a cleaning again and all disapear again !
oh ... i think i found why ! i test and i tell you after !