How to enter UEFI BIOS on Acer Aspire One, when windows 10 has disabled F2?

Solution 1:

You need to disable fastboot in Windows 10. You are not cold booting at the moment. If you cold boot, you will be able to use F2 as usual.

Use

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Power

HiberbootEnabled DWORD

0 = Turn off fast startup
1 = Turn on fast startup

and then boot again to access the BIOS.