flopy disk efecting system boot

[Kirbopher]

1 of my flopy disks is not working properly. so i put in my flopy disk and turn on my computer and it will say: Invalid system disk replace the disk and then press any key, and i take the flopy disk out and press a key and i runes fine untill i log in and an error comes up and it says:
Explorer.
this program has preformed a illigal operaition and will be shut down.
O i  also tryed it on annother computer and it comes up with the same thing so whats up with that

[Quantos]

The disk is probably bad, or possibly the FDD in both your machine and the test machine are bad, can you read other floppies?

I just thought of something else too, is the FDD enabled in the BIOS?

[Mulreay]

Floppy drives are notorious for corruption. Hence we all stopped using them not saying they are bad there useless, even a small magnetic field can corrupt a floppy. It's time to upgrade to CD/DVD.

[lectrocrew]

The disk in the floppy drive has to be a bootable disk or you will recieve that error. What is on the floppy disk you have in the drive?

[Mulreay]

It's a corrupt disk simple..

[Quantos]

It's a corrupt disk simple..

We will have to wait for the OP to reply and provide some updated status.  It's a bit premature to make that assumption.

[Mulreay]

I give you 10/1 odds that it is. It does not work in two computers. I say it is you say no.