|I have different floppies, and they seem to behave all the same. They all used to work, now they all don't seem to work.|
I'll test the floppy on itself (in a HD booted Windows), and run some CHKDSK's. I know that these floppies are notorious for bad sectors. But, they can't all be failing at the same time.
But, ... I see there are some issues with USB ports .. they occasionally don't work. Some devices always work, others sometimes fail to work (ie my USB hub). I noticed before that my computer seems to have problems providing power to USB ports ... floppy drive may be first to notice.
Still, using my USB floppy on boot, he does say he recognises it, the led goes on, I hear it work ...