Can not access Floppy Drive

I have a computer that when you try to access the floppy drive using explorer, it locks up and declares an explorer.exe error. The system is running Windows 2000 Professional. It was running SP2 and IE6. I upgraded it to SP3 and all other updates from the Windows update site. I replaced the floppy with a known good one. The floppy is accessible from a Command prompt and within applications, ie word and excel. Only Explorer exhibits this problem. I think this safely excludes the possibility of the floppy controller being bad. It is also running Norton Antivirus Corporate Edition.