Disabling Comodo FirewallDriver?

i have 2 computers using vista home premium…
the first computer is connected to the internet through a HSDPA modem.
and the second computer is connected to the internet by using vista ICS.

i have problems connecting the 2nd computer using ICS because it keeps saying that the default gateway is offline.
when i found out that the comodo firewall driver is causing problems(cannot connect) i disabled on both computers’ LAN and now the second computer can connect to the internet using ICS.

and i want to ask if that disabling the comodo firewall driver on computer 2 LAN properties have any side effects?