Upgrading Mapserver

[Lawrence Hartpence]

Hello,

I run map Server on a windows 2000 Server machine with IIS as my Web Server
Software.  I recently downloaded ver. 4.8 via MS4W.  I tried to rename MS4W
on my computer, but it will not let me.  I turned off the IIS services.  I
get an error message saying that I either don't have write permissions or an
application is accessing that folder.  

Any guidance would be greatly appreciated.

Lawrence Hartpence
GIS Coordinator
101 1st St N
Newton IA 50208
641-792-3084
hartpence_gis at co.jasper.ia.us