How to reset an Acer?

Hello I need help on how it takes to reset a ACER ASPIRE T135-87Z computer please? thank you for your help!

Acer are usually shipped with CD restoration (case of my sister's PC). Otherwise there is a hidden partition restoration.

I have the same problem, I would like to reset my acer aspire T135 and I also dont have the restoration cd. I also pressed ALT + F10 at boot, but it does not work. Please help me

Hello,
I have an Acer Aspire 9414Z. I got the config to factory once by pressing ALT + F10 once the Acer logo displayed. But for it works, we must check in the BIOS (F2 to boot on my Acer):
-- Acer Disk to Disk Recovery is activated
-- In the Main panel, which D2D Recovery is well on Enabled.

This for an Aspire 9414Z. But for other Acer, it must be the same & that I dont know either.