Hi,
This is a followup to this thread: viewtopic.php?t=4778
At the end of that, I now have the original Windows 11 Pro and the new Windows 10 Pro installed and booting via BIU.
I want to do some new/additional installation testing... I want to install a 2nd Windows 10 Pro now, and I wanted to confirm that to do that I "just":
1) Use BIU make space available and make a new NTFS partition
2) Go to the BIU home page that has the box with the boot menu
3) Put a USB stick win the Windows 10 installer in the USB port
4) Click Reboot on BIU (and it doesn't matter which boot item is highlighted?)
5) When the laptop is rebooting, press F12 to get the BIOS boot choice menu
6) Select the USB with the Windows 10 installer
After installing the new Windows 10, may need to reactivate BIU
After the above a new boot item for the new Windows 10 should be added automatically by BIU.
Is the above correct?
Thanks,
Jim
Followup to my earlier post/thread about dualboot Windows
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Re: Followup to my earlier post/thread about dualboot Windows
#4 - the boot menu won't be shown if you choose edit / reboot (ctrl-alt-del can be used too). Just ensuring you're not booting from the boot menu.
Re: Followup to my earlier post/thread about dualboot Windows
Hi,
What you said is kind of getting at something that I am/was trying to test/understand
....
I *THOUGHT* that from the discussion in the earlier thread, that with BIU, there is something new, where BIU can figure out, itself, how to create the new boot item, BUT, in order for BIU to do that, IT IS CRITICAL to get to the BIU home page (the page that appears initially when you boot into BIU, with the box in the middle with the boot items listed), and ONLY THEN, after that, do a Ctrl-alt-del (or click the reboot button on the bottom right).
Am I misinterpreting/misunderstanding what was discussed this weekend?
Also, BTW, besides that, I am kind of curious HOW BIU can figure out (a) that it needs to create a new boot item and (b) HOW TO BUILD the new boot item (it seems like magic to me)?
Jim
What you said is kind of getting at something that I am/was trying to test/understand

I *THOUGHT* that from the discussion in the earlier thread, that with BIU, there is something new, where BIU can figure out, itself, how to create the new boot item, BUT, in order for BIU to do that, IT IS CRITICAL to get to the BIU home page (the page that appears initially when you boot into BIU, with the box in the middle with the boot items listed), and ONLY THEN, after that, do a Ctrl-alt-del (or click the reboot button on the bottom right).
Am I misinterpreting/misunderstanding what was discussed this weekend?
Also, BTW, besides that, I am kind of curious HOW BIU can figure out (a) that it needs to create a new boot item and (b) HOW TO BUILD the new boot item (it seems like magic to me)?
Jim
Re: Followup to my earlier post/thread about dualboot Windows
Jim,ohaya1001 wrote: Mon Mar 10, 2025 10:11 pm
... I want to install a 2nd Windows 10 Pro now, and I wanted to confirm that to do that I "just":
The quickest and easiest way to get another Win10 is to use Part Work and Copy/Paste your current Win10 to Free Space. Make sure you select "Add to Boot Menu" and a Boot Item will be created.
Edit... I just did a Win11 copy. It took one minute.
A Win10 copy took 35 seconds.
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Re: Followup to my earlier post/thread about dualboot Windows
I was just clarifying that you don't select a boot item. choosing reboot would require going to maintenance, click edit / reboot (or just ctrl-alt-del from the menu).
Re: Followup to my earlier post/thread about dualboot Windows
Hi Brian,Brian K wrote: Mon Mar 10, 2025 11:41 pmJim,ohaya1001 wrote: Mon Mar 10, 2025 10:11 pm
... I want to install a 2nd Windows 10 Pro now, and I wanted to confirm that to do that I "just":
The quickest and easiest way to get another Win10 is to use Part Work and Copy/Paste your current Win10 to Free Space. Make sure you select "Add to Boot Menu" and a Boot Item will be created.
Edit... I just did a Win11 copy. It took one minute.
A Win10 copy took 35 seconds.
Thanks for the suggestion, but part of what I am "testing" is I am checking some product keys, so just copying the working partition wouldn't allow me to test that. Sorry I should've been clearer about what I was trying to do!
NOW, following up on earlier comments I am confused about the process. I thought that I *WANTED* to go back to the main BIU page (again the one that appears when you boot into BIU), and THEN cause a reboot of the machine (with the windows usb stick inserted)... now, I am confused

Jim
Re: Followup to my earlier post/thread about dualboot Windows
Hi Brian and TBU,
I had to go back into BIU... honestly I wasn't sure what you were referring to when you said "edit then reboot"... I guess I don't have the UI memorized...
So, it sounds like what you all are saying is to be in BIU, but DON'T be at the page where the BIU boot menu (with the list of boot items to select to boot)... Is that correct?
So, like step #4 should make sure you are running BIU but that BIU is not at the page where the selectable list of boot items is visible, then do Ctrl-alt-del? And if you do that BIU will install Windows and automatically create a new boot item...?
Is that correct?
I had to go back into BIU... honestly I wasn't sure what you were referring to when you said "edit then reboot"... I guess I don't have the UI memorized...
So, it sounds like what you all are saying is to be in BIU, but DON'T be at the page where the BIU boot menu (with the list of boot items to select to boot)... Is that correct?
So, like step #4 should make sure you are running BIU but that BIU is not at the page where the selectable list of boot items is visible, then do Ctrl-alt-del? And if you do that BIU will install Windows and automatically create a new boot item...?
Is that correct?
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- Joined: Thu May 05, 2011 10:37 pm
Re: Followup to my earlier post/thread about dualboot Windows
I'm just ensuring someone else reading doesn't take #4 as booting a boot item since there is no reboot option.
Re: Followup to my earlier post/thread about dualboot Windows
Ah.... When I said "Click Reboot on BIU" the "Reboot on BIU" was the Reboot icon at the bottom right!
I guess I could've been clearer
...
Jim
I guess I could've been clearer

Jim
Re: Followup to my earlier post/thread about dualboot Windows
TeraByte's idea. While in BIU, insert the Win10 UFD. Click Reboot. BIU reappears. On the Boot Menu,
Click Direct Boot, you should see the UFD, click Boot.
Win10 UFD boots. No need to press F12.
Click Direct Boot, you should see the UFD, click Boot.
Win10 UFD boots. No need to press F12.