http://social.technet.microsoft.com/Forums/en-US/w7itproui/thread/83dc3de6-70b7-450f-992c-60511e4a6c4f/
DISABLE firewall notifications; [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Action Center\Checks\{E8433B72-5842-4d43-8645-BC2C35960837}.check.101] "CheckSetting"=hex:01,00,00,00,d0,8c,9d,df,01,15,d1,11,8c,7a,00,c0,4f,c2,97,eb,\ 01,00,00,00,50,af,75,7c,db,bc,c9,47,b3,e8,09,5c,14,3a,93,83,00,00,00,00,02,\ 00,00,00,00,00,03,66,00,00,c0,00,00,00,10,00,00,00,8e,26,07,26,60,af,37,01,\ 0a,d0,c8,3d,01,6f,8f,27,00,00,00,00,04,80,00,00,a0,00,00,00,10,00,00,00,a4,\ e2,62,ea,16,60,4c,43,d5,e2,52,ff,5e,71,79,53,28,00,00,00,fc,7e,90,bc,fe,b1,\ a6,cf,4e,47,6a,34,80,e6,92,86,7a,e5,22,d6,60,a3,89,e4,5b,07,2f,58,87,c1,98,\ 6c,f0,92,df,36,04,8b,70,cf,14,00,00,00,53,aa,30,5c,ca,fa,db,5f,0e,69,d1,30,\ 26,02,a2,ee,b9,1a,ed,25
ENABLE firewall notifications; [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Action Center\Checks\{E8433B72-5842-4d43-8645-BC2C35960837}.check.101] "CheckSetting"=hex:23,00,41,00,43,00,42,00,6c,00,6f,00,62,00,00,00,00,00,00,00,\ 00,00,00,00,01,00,00,00,4c,00,00,00,48,17,00,00
...check the above links for details - not sure if this is 100% working - you would need to test.