I'm trying to install Ubuntu 20.04 alongside Windows 10 on my Acer computer. While trying to install Ubuntu, I was prompted with a warning about Intel's RST needing to be turned off. Following Choice #2 in heynnema's answer, I learned that I should:

(run in command prompt) bcdedit /set {current} safeboot minimal

(in BIOS) Change the SATA Operation mode to AHCI from either IDE or RAID

Before trying anything, I played a little bit with the BIOS to see how that could be done. Had to do some research and found this answer, which suggests:

a) access windows and then press windows + r and type msconfig. Then, go to system boot and activate safe boot. Then restart windows;

b) then access the BIOS, go to the main tab, press ctrl + s and change the sata mode to ahci.

That works, the option to change to AHCI is there. I haven't tried it yet because I was wondering if the bcdedit command proposed by heynnema does the same as following a) and activating safe boot through msconfig.

I thought doing both - in case they're similar commands - could cause me problems.

  • 1
    They do the same thing.
    – heynnema
    Aug 19, 2020 at 18:23
  • Thanks. (1) Am I right to assume that after changing SATA to AHCI and booting in secure mode, if I go to msconfig and deactivate safe boot is the equivalent to running bcdedit /deletevalue {current} safeboot? (2) Should I expect Windows to work normally after this process to get RST turned off?
    – kiabbo
    Aug 19, 2020 at 19:52
  • 1
    1) Should be... but I wouldn't recommend deviating from the written procedure too much. And you want to turn off FAST BOOT and HIBERNATION in Windows, and SECURE BOOT in your BIOS. 2) Yes.
    – heynnema
    Aug 19, 2020 at 20:17

1 Answer 1


From the comments...


Recommend following the instructions (Choice #2) found in this answer without deviation.

In Windows


  • boot into Windows
  • open the Power control panel
  • choose change what the power buttons do
  • choose change options that are unavailable
  • uncheck fast startup
  • close the Power control panel
  • open an administrative command prompt window
  • type powercfg /h off

If you wish to check your C: drive, and others...

  • type chkdsk /f c:
  • approve to run chkdsk at next reboot
  • type chkdsk /f x: (replacing "x" with drive letters of other visible NTFS partitions)
  • reboot into Windows to let chkdsk run on drive C:


  • disable SECURE BOOT
  • (1) Only after these steps have been taken, in this order, should I proceed with the Ubuntu installation? (2) Excuse my ignorance; why is it necessary to disable fast boot, hibernation and secure boot to be able to install Ubuntu alongside Windows (in a machine with Intel's RST)? (3) Should any of these changes be reverted after Ubuntu has been installed?
    – kiabbo
    Aug 19, 2020 at 20:29
  • 1
    @kiabbo 1) Best way to do it. 2) To be able to install Ubuntu, and make it run reliably without problems from Windows. 3) No.
    – heynnema
    Aug 19, 2020 at 20:32
  • 1
    For future reference: the above worked perfectly! On some computers, to be able to disable Secure Boot, a supervisor password should be set in BIOS. Also, to change to AHCI, I had to follow letter b) in my question. Might be useful for someone else.
    – kiabbo
    Aug 20, 2020 at 16:21

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.