Default boot resolution

When I boot from a USB, the default screen resolution is extremely tiny.  This happens whenever I boot into an  oddball OS.  Most such OS's don't pay any attention to that screen resolution, so the installation screens are extremely hard to read.  Is there any way to enlarge it?

Primary background: I'm trying to boot the Hiren utility CD and the screens are unreadable.  I  have the same problem with the Kubuntu installation CD.

Secondary background:  when I first was setting up my Inspiron, I installed Ubuntu (Kubuntu,actually) and botched the installation. The resulting configuration had a perfectly fine Kubuntu system but Windows was inaccessible.  I tried to restore it using a USB stick with the Win11_English_x64v1factory restore image, but that didn't work: a reboot followed by F12 only led me to a blue Install screen, which was useless.

I think the reason for that was that the botched installation left behind artifacts that threw the factory restore off.  A possible example might be a defective boot partition. That's only a guess, but I assume that the factory restore would work on an unpartitioned  machine.

So a likely remedy is to remove whatever partitioning is there or, failing that, zero out the entire volatile memory.  That should enable the factory image restore to  proceed.  For that I need something like the Hiren utility CD or anything else that will enable me to clear the partitioning.