keep getting mapped drives I don’t want

I have a NT 4.0 server with IIS 4.0 and all the latest M.S> patches loaded and running McAfee Netsheild. I have a drive
S:\ksn-inc\share which is suppost to be mapped
Every morning when I get into work if fine 4 more drives maaped and they arealways the same ones.
T:\ksn-inc\share
U:\ksn-inc\share
V:\ksn-inc\share
W:\ksn-inc\share
Any suggestion on how to fine out why I’m getting these mapped drives ?