XPS 8950, strange message

In the BIOS check your Boot Menu and make sure that Windows Boot Manager is the first item on the list. It is possible though that your SSD is showing early signs of failure. I would backup the boot drive as a precaution.

If you searched here in this forum site for 'pxe over ipv4' you would have found many posts and the answer probably. Here is a recent one, https://www.dell.com/community/en/conversations/alienware/17-r4-pxe-over-ipv4-error-on-startup-after-failed-windows-10-fresh-install/6500b4d4f60c152b2cff691a

It more than likely is that Network booting 'IPv4' is on the list of boot devices or even enabled in your BIOS.

Since you didn't disclose the exact Dell model (assume it is an XPS) specific instructions other than check the BIOS boot order can't be provided. It is always wise to provided the PC model and any post.

If it's trying to boot via PXE, it's possible the motherboard battery died and BIOS settings got scrambled. So I'd replace that battery, before doing anything else.:

1. Power off, unplug power cord from rear of PC
2. Press/hold power button for ~15 sec
3. Open case and remove motherboard battery (check Service Manual for details)
4. Press/hold power button for ~30 sec
5. Install fresh battery, likely CR2032 3-volt coin cell battery
6. Close up and connect mouse, monitor, keyboard
7. Reboot and tap F2 to open BIOS setup
8. Confirm Windows Boot Manager is first on the boot list, and if listed disable or delete boot via PXE over IPv4 and PXE over IPv6
9. Save the changes and exit setup

@RoHe​ Now that i think about it, when i ran Support Assist it did a BIOS update.

It was after that that the message started appearing.

I will go into the BIOS and check.

Model: XPS8950

Did you replace the motherboard battery?

You probably should do that before checking BIOS because removing the battery, as above, will reset BIOS to its default settings.