After seeing many people complain about their weak Internet security I decided to write down some things that will help you for your Internet security.
First, here are some tips to make windows safer :
For basic security and update patches install Service Pack 2 for Windows XP or Service Pack 4 for Windows 2000.
Once a month use Windows Update so you can get latest pacthes.
When you download software from Internet make sure you download it from original website.
Always run anti Trojan and anti virus software.
Even if you don't use it you have to make your Internet Explorer as safe as possible.
When you access Internet you are browsing web using a browser such as Internet Explorer.The Internet Explorer contains several security vulnerabilities. You should make it as safe as possible or switch your default browser to an alternative. You will have to set some options from Manage Add-Ons in Internet Options. You will see a list of add-ons that can be activated or deactivated. If you see any unusual entries just deactivate them so you can be sure you don't have a trojan/worm.
Under Internet Options -> Security -> Internet -> you will see Edit Level.You should set it to high in order to disable most of security threats.