Lenovo E145: Function keys
Function keys do not seem to work properly. Perhaps they so very unexpected things. This may be very disconcerting if you interrupt normal startup by pressing <enter> and then are unable to select one of the menu options.
You have to press the <Fn>-button at the same time as the function key in order to use it as a function key.
You can switch this behaviour around by setting a BIOS option.
Enter the BIOS setup.
Under the Config tab select item Keyboard/Mouse. Now set item Change to "F1-F12 keys" to Legacy.