hi i have a big problem when i instaling any firewalls (norton , macafe .....) my computer crash when the firewall load in start up (crash = compuer stop response put the mouse move freely !!!) so i need to format the copmuter (when i instal the firewall my computer is clean no other software has been instal ) i dont know what is the problem im using وMcAfee VirusScan 7.1 also windows xp p4 1500 ram 256