I have recently suffered some hard attacks on my 2-PC LAN after which I had some file losses.

Today I had another attack. Firewall message:

Details: Attempted Intrusion "HTTP_IIS_ISAPI_Extension" against your
machine was detected and blocked
Intruder: 195.174.133.82(4051)
Risk Level: High
Protocol: TCP
Attacked IP: I AHVE EDITED THIS
Attacked Port: http(80)

Since I have applied all XP patches and have updated firewall and AV, are there any additional secutiry tools I could get to work to:

Hide my PC as a web server (I am deploying Apache for web development) or hide it completely from IP scanners and other stuff

Do anything that could protect me more?

I am about to ompimize security additionally using LANGuard. Is there any better tool?

Thanx.