Help! Installed firewall on wifes Vista laptop - No network or internet

Hello all! First post and I wish it could have been under better circumstances.

Anyway, I am currently running the firewall on two XP PC’s and decided to install it on the wifes Vista Laptop.

I installed it last night and it seemed to install just fine. I got all the way through to the “scanning for malware” process and went to bed. When I woke up there was no Comodo icon running and network and internet access were gone. Also, there was nothing for Comodo in start/program files as well as nothing showing up in add/remove programs. There were instances installed in C:Program files and Program data, but nothing in C:users/app data, etc (I kow its not the correct path but you get my drift (:WIN))

I had to perform a system restore to get everything back.

Any ideas as to what could have happened?