I've said it a thousand times: Never go without virus protection on your computer. I read stories every day from folks who've lost hundreds of gigabytes and dollars to malware.
Don't take the risk!
Every second you go without a solid defense is a second that viruses could be stealing your bank passwords or account information. If you don't have anti-viruse, or your subscription has expired, today is your day to download a new one.
AVG AntiVirus Free is a very good option. It's one of the very best anti-virus suites around, and it won't cost you a penny. This program is updated often to protect against emerging threats.
Warning: if you have an anti-virus program you're happy with, do not install another one. Anti-virus software will conflict with other anti-virus programs. Your computer won't be happy.
Choose the link corresponding to your version of Windows. What's the difference between 32 and 64-bit Windows? Click here to find out.
When you install AVG, you'll see a screen during the process offering to install the AVG toolbar. This is a safe add-on for your Web browsers. It may help protect you against online threats, but it will change your browser settings.