how to restore acer aspire s3 without cd

[Arbre]

Hello

i just bought a second hand acer aspire s3 for my girlfriend.
After 2 or 3 days, and seeing that the SSD is completely full (not the HDD), i decided to restore the computer at the factory default. The OS is Windows 7.
The thing is that there's not the Acer Recovery Management program, and the Alt+F10 doesn't work either.. I'd be furious to be forced to buy a recover cd or something like that, as you can understand.
Thanks a lot for your support.

Arbre.

 

[armapker]

I know for my laptop you can re-download the software used to create the recovery disks. (for me it is onekey recovery). Maybe there is for yours? What is your model #

 

[Arbre]

Hey thanks for your answer!
my model is an Acer Aspire s3...