Looks like it sets the Duplex settings and speed settings of your NIC to 100 FULL how annoying if you have a gigabit local network. Looks like the MTU is NOT changed see on the right hand side, its says 1500, that looks like some dumb windows accelerator program you have to tune to know how fast your network is! I think avoiding the disk is the best idea.
BTW i knew 20000 was bogus before I looked at the page because the largest MTU for gigabit is 9100! 9000 is normally used allowing 100 for over heads such as the 4 bytes for vlan tagged packets.