I was trying out McCafee Anti-Virus software, but saw BT Yahoo free software by Computer Associates, I removed the McCafee Virus software and tried to load your CA software but nothing happens! (The anti spy works & Mail Protection) I have clean my registry with PC tools and restarted my PC a number of times I have downloaded the Software form the site Numerous times But the soft ware still says "Install now" I would be most pleased to here what I am doing wrong? Just to inform you I have worked with computers for over twenty years. Therefore, I’m not a novice; you don’t have to be gentle with me. I have Zone alarms firewall install and am running XP pro (Pack 2)

I want to clean out my computer a little because I know things are probably getting clogged up. I know I need to clear out the cookies & the registry, etc but I can’t remember how to do all that. Can someone please tell me what should be cleaned up & how to do it? I am computer literate more than many of my friends so I know I can do it myself as long as I have a lil guidance.

Basically for overall PC maintenance & optimization.
Which is the best for free version:
And which is the best for a paid version?
What do you think of this software called ‘PC Optimizer Pro’?

PC Optimizer Pro

my computer keeps freezing up & running slow and my default security software says i need virus protection, but it only offers ones with costs. any suggestions?