At firsh download latest IOS that can find
For ex c3750-advipservicesk9-tar.122-46.SE
if want use web gui, have to load ios tar without index MZ
for upload I use tftp server on the Windows host 192.168.1.54
WS01-3750-48ps#ping 192.168.1.54
WS01-3750-48ps#sh version
>System image file is "flash:/c3750-ipbasek9-mz.122-55.SE10/c3750-ipbasek9-mz.122-55.SE10.bin"
WS01-3750-48ps#sh ip interface brief
WS01-3750-48ps#sh ip http server status
WS01-3750-48ps#dir flash:
WS01-3750-48ps#erase flash:
WS01-3750-48ps#archive download-sw /overwrite /reload tftp://192.168.1.54/c3750-ipbasek9-tar.150-2.SE4.tar
you can use web express
for more download Cisco Network Assistant