im running windows vista ultimate edition… i already installed avira antivir security suite and just installed boclean anti malware…is it ok for my system? does having multiple security programs harm my pc?

or can anyone help me choose a better program including
*anti virus
*anti malware
*firewall
and if possible help me find a
*registry cleaner
*system optimization program

i already have tweak vista but i dont seem to be contented by it…

thanks!

_sorry for the user name…it was my stupid brother who made this account*