I have a Acer laptop with empowering technology and I was wondering what restore system to factory default actually does - whether it restores it to how I bought it or delete everything that came on my laptop.
Yes it does delete them, it restores the unit to how it came from the factory, but they will be put back afterwards.
So, whatever the laptop came with when you bought it should be how it will end up. So, whatever microsoft include with Windows will be what ou get.
Your laptop will have a recovery partition, the recovery process will completely wipe your main partition ( normally C: with windows on it) and from the recovery partition it will rebuild it so that it will end up exactly as it was the day you bought it.