After installing CC Cleaner and cleaning my system my internet connection slowed down and started to give me lots of "Page can not be displayed" messages.

IE6 Tools/internet options/security I have changed my settings from "Restricted sites zone(more secure) TO Internet zones (less secure but more functional.

Is it safe to leave it like this please?

I use Zone Alarm 5.5.094.000, AVG 7 and I have an ADSL connection through ZyXel Prestige 600 series.

Thank you