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December 14th, 2019 13:00

XPS 15Z won't boot from USB ports

I am completely confused about how this forum works.  After a couple of weeks of searching and trying different things, I found the solution to the USB problem listed in THIS thread.  The problem is very misunderstood, and the solution posted there is wrong.  I know the real solution, but apparently I'm not allowed to reply to a thread that's marked as solved.  The problem is not solved in that thread, so I went to the trouble of signing up for this forum in order to share the real problem and the real solution ... how do I do that?

7 Technologist

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12K Posts

December 14th, 2019 14:00

Make sure you are in the XPS forum discussion group as you are now. Then make sure you are signed in and click on Start A Discussion at the top of the page.

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December 18th, 2020 20:00

have you resolved this issue. if so how? i am unable to boot into windows at all bios version a02 

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February 23rd, 2024 12:09

@Omegalife_Jm​ The solution in the link does work. As far as I can see the only procedure that they failed to mention was that the USB boot drive was formatted MBR ***NOT*** UEFI

Here is what worked for me today after 6 hours of faffing around.
- Unplug the RTC battery for a minute

- Create Windows boot drive as below

- Format USB drive as MBR using Rufus 4.2 and Windows 10 22H2

- Insert USB drive in USB/eSATA port

- Power on preferably with power cable inserted.

I hope this helps

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