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Amazon.com: DBTLAP CMOS Battery Compatible for Acer Aspire E1-521 E1-522 E1-571 E1-531 V3-551 V3-571 E17 CMOS Bios RTC Battery : Electronics
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No option for changing Boot mode UEFI or legacy in boot menu in insydeH20 v1.07 in aspire E1-571. — Acer Community
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Acer V3-571G] How to unlock this BIOS (Advanced settings menu)? version 2.21 - BIOS Modding Guides and Problems - Win-Raid Forum
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