How to improve computer security?

Right now I'm using Kaspersky Internet Security 2011. It basically have all the features you need to keep your system secured.

Install good anti-virus, update it regularly
use internet security tools
usb disk security application

If you have been ben using your PC for a long time, chances are that your PC Performance might have slowed down.
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Demin Martin

One of the best means to advance your security is advancement to the latest adaptation of your operating system. Windows 2000 is in a absolutely altered assurance alliance to Windows 95. I think you should to use LINUX for best results.

Activate the MS firewall

set your PC's firewall not to allow incomming connection

im currently using avg and panda cloud av, so it can eliminate malware or trojan

It's a combination of a good antivirus, firewall & anti-malware programs. Go with ESET NOD32 + Windows Firewall (default) and Malwarebytes = best security.

Install a good antivirus on your system & keep it up to date. In my suggestion Avast is the best antivirus.

Computer security can improve through keep updating you antivirus.

Follow this and you're good to go!

I would suggest to increase firewall settings as well as install a anti-virus software.

Use privacy guardian by pc tools you can normally get it with a promo license if you look around, clear history often
and i use kaspersky internet security.