For firewall I recommend Kerio and for antivirus I recommend KAV or if you are looking for a free alternative I recommend AVG.
If you are interested in the firewall I talked about, let me know and I will look up the link for the older version. The new version has been known to have some flaws, but the older version works great.
As for the error that pops up on you, does it tell you what file is trying to add that start page?
ScHwErV