Windows security is important to prevent issues like loss of productivity from spam, loss of data, identity theft, and credit card fraud. The document provides 6 steps to help prevent security issues: 1) Use an anti-virus tool to protect against viruses, 2) Guard against spyware using recommended tools, 3) Filter spam to manage email, 4) Beware of phishing attempts, 5) Apply security updates regularly, and 6) Browse securely by looking for https and using passwords safely. While Windows is vulnerable due to its popularity, following prevention steps can help avoid security problems.