Want Safe Ejection of a Cruzer Edge 8GB

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Same thing happened to me.  Cruzer jump drive says it is not removable.  This followed using it to run recovery effort on a problematic laptop.  The cruzer was used to repair the laptop windows 10 os and seems to have done a good job (have iso image on the cruzer to use for the above purpose).  Now I get a message returned that it is not removable when I try to safely eject it.  Is the pc reading the iso image (windows 10) that is on the cruzer as now being my system files or a similar problem, do you think?  I haven’t tried shutting down and removing in case the laptop now thinks it “needs” the information/iso on the cruzer to even boot.  Any help or thoughts would help,  Thanks