I once had a machine with which I needed to actually disable the hard drive boot option and not just switch the boot priority around as that didn`t work...once I had sorted my problem out I went back and needed to enable the boot options...just saying how I managed to do this.
No it was not physically disconnected...just disabled in the BIOS settings.
I went into the BIOS and in the Boot section had to select the "disable" option in the box...then I had to ensure the boot priority was set for the disc reader/usb option...until I had gone through this process I had tried time and again to boot from the disc reader but to no avail...as I`ve said though,this was on a desktop but I don`t see there would be any difference...but,if your experience of life is as mine,nothing ever seems easy !
Once I had re-installed everything I reset the boot priority in the BIOS and all was fine.
I am at the BIOS, on the Boot screen of the InsydeH20 Setup Utility. I can only move the device up and down and there is no option to disable it. Something new to me though. Windows Boot Manager is not a device. So in this case what is the difference between the Windows Boot Manager and the HDD. I have moved the ATAPI CDROM right to the top, but it makes no difference.
When the Boot Option Menu comes up, it shows only 1 option which is "1. Windows Boot Manager (TOSHIBA MQ01ABF050)".
I put a linux live CD in. When the computer starts, it seems to access the CD but then goes straight to Windows 8.
Boot Mode UEFI -- I want to try to switch to Legacy BIOS but I am not too sure.
Secure Boot: Enabled -- I want to disable this to try but find no means to do it.
The Boot priority order is as follows before change.
I guess the secure boot is stopping the change of priority...I have seen in this forum that there are ways of going about the changing the BIOS to Legacy etc but not done so myself...so won`t presume to give you any advice...sorry I can`t help you.
As a matter of curiosity, today I went to check out an Acer computer one of my friends bought from Acer web site recently, just a few weeks ago. He bought an Aspire V5-431P. Not to say whether I could boot from any inbuilt devices, I couldn't even get into the BIOS. I tried F2, F1, Del, Esc, F10. I even tried the same with the function key held down. So the BIOS is not accessible at all. Certainly F12 would not bring up the BOOT menu. Likewise, the accompanied electronic manual says one can access the BIOS by pressing F2 while the computer is booting up doing the POST while the logo is being displayed.
I wonder if Acer staff would care to comment. Have computer designs been changed and no longer support booting from other devices? If this is true, this must be a backward step. Or at least they should advertise it for this would be an exception, not a norm. The worst thing is their manuals are not updated. Also I wonder why the support staff does not seem to be equipped with the information or the source of information for clarifying the issues. I would expect they should be able to tell me the feature is not supported and the manual is wrong or the computer is faulty. However, I didn't get a clear-cut answer. I must admit and appreciate their first level support staff were very friendly and keen to help though they couldn't unlike one of their second-level support staff I got to talk to.
I had the same problem with my Acer laptop. I ignored the problem for over a year, but yesterday I decided to get to the bottom of it. By default I can't change the boot priority in the bios, but I can enable the "F12 boot menu" under the main tab in the bios. First I enabled the F12 boot manager because it is disabled by default. After enabling it, I restarted my laptop again and pressed "F12" instead of "F2" and was taken to the boot manager. The boot manager allows me to choose what device to boot from. Now I am able to boot from CD, network, or any usb device without any problems.