The Acer Aspire uses an updated version of the BIOS called the Unified Extensible Firmware Interface. You can change the UEFI settings using the advanced options of the update and recovery function in Windows.
Step 1
Swipe in from the right to open the Windows Charms and choose the gear-shaped Settings icon.
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Step 2
Select Update and Recovery.

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Step 3
Choose Recovery from the left column and select Restart Now under the Advanced Startup options.

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Image courtesy of Microsoft Corporation.
Step 4
Select Troubleshoot.

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Step 5
Choose Advanced Options.

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Image courtesy of Microsoft Corporation.
Step 6
Choose UEFI Firmware Settings.

Image Credit:
Image courtesy of Microsoft Corporation.