Hello, thank you for the help. The DVD+Rs arrived, along with the DVD Drive. I tested the installer on one of my laptops, and found that its contents didn't change. (which is to be expected, as DVD+Rs can't be rewritten) I didn't bother testing that on different computers, because the result would be the same. However, I have tested the USB drive on a few other computers and here are my findings:
On the Lenovo Legion 7i Gen 5*, Lenovo Thinkpad X1 Carbon Gen 2*, Lenovo Thinkpad X1 Carbon Gen 5 Intel*, and one Lenovo Thinkpad E14 Gen 5 all showed the corruption error.
*These laptops have been tested for installer corruption twice (a week ago, and just now)
However, on the Lenovo Yoga C740 and a different Lenovo Thinkpad E14 Gen 5 Intel showed no corruption issues.
Both the Thinkpad E14 Gen 5s had the same specifications and type number, differing only in that the one with corruption of the installer has 24GB of memory (16GB installed in the slot, 8GB soldered) and the other only has 8GB soldered. They both have the same BIOS version, R2AET32W(1.07). Again, the ones that had corruption all had it at the same location. (byte 2303211, line 21165)
This seems to be really interesting because the corruption only happened on certain computers, and it would stay that way on repeated attempts. Thank you for the help.
Have a wonderful day,
Ram