I have installed Qubes on several occasions to a T480, not the S model.
Likely corny is correct in his suggestion to be concerned with how you installed to the USB drive that you are using to install Qubes from. How the drive is created has been a stumbling block for some.
And while you likely got the part of setting the BIOS/UEFI accomplished already (I personally have made every miss-step one could make doing these things)
In the BIOS/EFI. Is virtualization turned on?
I install in Legacy Mode, not UEFI.
How to install in UEFI mode, uh, someone else can write about that.
So I need to make sure Secure Boot is turned off. and Legacy mode is turned on.
I just looked at BIOS/EFI and there is a thing in the boot list that is âquick bootâ
I have had some experiences where that needed to be flipped the other way. But I am not sure of that at this moment.
M$ felt they could get Windows 10 to start faster if they put the drive into âhibernateâ instead of shutting it down.
I, uh, have done some things that are probably -not necessary- Over-effort. Or just plain wrong. I try not to create the boot drive using Windows.
Some of my efforts creating the boot USB for Qubes, I ended up with something that did not create the boot part of the computer drive (using an SSD, although I want to say hard drive) in a way that the first start of computer drive was not successful.
Instead.
I have used Mint Linux to create the USB (Qubes installer) with the Mint âUSB Image Writerâ
I more recently have started using the program of âFedora Media Writer.â ("Fedora Image Writer is easily installed in Mint)
One of the things some folks have had problems with. Creating a dual boot with different OSâs. Like keep Windows and add Qubes. If that is what you are attempting, then please say so and some here can advise you on the one or two things that one must do to make that functional. As the documentation says, for security reasons -Qubes should be the only OS in the computer.
I have also, with my unusual techniques of creating the USB key, and thinking of all the previous things having been on computer drive. I use a live version of Linux to format computer drive to FAT32. and completely clobber the Boot Sector on the computer drive.
I figure the Qubes installer will re-Format the hard drive into what it prefers.
I have several laptops which have two separate drives installed.
One laptop refuses to boot-- if I try to have an operating system on both drives. One drive must be Formatted and left alone. I am pretty sure that if I had the knowledge of some here, there is a way to get around that, but I assume you could do without two drives in this instance.
I have another laptop that does not care if there are different OSâs on two drives. Likely makes the laptop less secure.
After you get Qubes installed. There is a way to implement âAnti-Evill Maidâ without hardware flashing ROM. Also, as you probably know, one can dramatically increase the RAM in that model.
Sorry if I miss-wrote here, I have not had coffee yet. Hope someone else can point out where I am in error.