Acer Aspire ES 14 - Changing your Windows version; Changing to Windows 8.1

Changing your Windows version - 33
CHANGING YOUR WINDOWS VERSION
Your computer is configured with two operating systems, Windows 7
and Windows 8.1. When you first start your computer, Windows 7 will
start. Please follow the setup process.
Changing to Windows 8.1
To change to Windows 8.1, open Acer eRecovery Management (Start
> All programs > Acer).
1. Select Restore, then Restore Operating System to Factory
Defaults.
2. Select Yes.
Note
Information in this section may not apply to your computer.
Important
Changing the OS will erase all data on your computer. Create a backup
before changing.