I just installed XP64 and 6.0.393 and noticed a lot of things under "Rules for packet filtering" that weren't there before. So what is ICMP and what are all these malicious software port?
ICMP = Error reporting protocol for IP. If there are any problems with packet delivery an ICMP message will be generated
Malicious Ports = are some of the commnon ports used by malicious software. However, it can cause conflicts when all of them are enabled at once. Therefore they are switched off.