Can my computer catch a virus on the Internet?
You cannot catch computer viruses from visiting most Web sites, reading email, chatting, or posting on newsgroups. You can only catch viruses when you open applications or documents that you've downloaded from the Internet. If someone you don't know sends you an email with an attached file, you should check the file with an anti-virus program. If you use recent versions of Microsoft Internet Explorer or Netscape Communicator, you run a slight risk of encountering a malicious "applet" — a tiny application that is automatically downloaded from a Web site. This is a very remote possibility, but if you're worried about viruses, you may want to turn off your browser's Java, JavaScript, and ActiveX capabilities.

Where can I find out about Internet security?
Security is currently a big issue on the Internet. You can learn how to protect yourself against viruses, F-Secure Computer Virus Info Center , online fraud National Fraud Information Center , and spam Spam Abuse.

Is it safe to give out personal information on the Internet?
You must be very careful when sending messages through the Internet. Since each message passes through several computers, it's possible (though unlikely) that someone other than the intended recipient will be able to intercept and read it. So, you should NEVER send personal information — especially credit card numbers — via email.

Is it safe to give out my credit card number to buy something on the Web?
Shopping on the Web can be an enjoyable pastime, and most online stores are as safe as — if not safer — than physical stores. However, you must be careful to avoid security lapses when shopping online. Before you purchase something online, make sure that the site will encrypt, or encode your credit card number. When a message is encrypted, no one but the intended recipient can understand it. If the site can't encrypt your number, call the company's order line and place the order over the phone.

What are cookies? Are they safe?
Cookies are small text files that your browser picks up at certain Web sites and stores on your hard drive. These text files contain personal information — typically, your name, address, and username — that YOU provided when you registered with the Web site. This lets sites create customized pages (like a Yahoo personalized Start Page), online shopping carts, and targeted ad banners. Since cookies can only be read by the site domain that created it, they are completely safe and secure. Webmasters can't snoop through all your cookies and find out information about you.

So what's the big deal? Why do some people object to cookies?
Why do some people object to cookies? Some anti-cookie sentiment is based on misinformation and paranoia: That cookies are malicious, that they can snoop around your hard drive and gather information about you, that they can reveal personal information. But cookies are simple text files that cannot capture any information about you. They only store information you have voluntarily provided while visiting a site. And browsers already reveal some information about you without cookies: your IP address, operating system, browser type, etc.

What's the best way to choose a password?
When choosing a password, try to pick something that is easy for you to remember but difficult for others to guess. DO NOT CHOOSE YOUR USERNAME OR YOUR REAL NAME. You should also avoid easily guessed words like "password" or "secret." The safest passwords include both letters and numbers. Once you have selected a password, write it down and keep it in a secure place.

Should I change my password?
If you suspect that someone might have stolen your password, you should change it immediately.