How to install a cd-rom without a floppy disc

I bought an old Ibm thinkpad laptop with a removable cd-rom drive & and removable floppy drive. After a while somethings on it got deleted and now the cd-rom drive does not work. The computer has three things deleted that every time I log in it keeps saying that they are lost or something. And I want to reinstall it if possible but the floppy disc needed was rewritten with something from the previous owner. What am I supposed to do to install it?

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