In fact,I don't use any antivirus because my computer never be virused.
hum...Potential consequences of not installing security updates are damaged software, loss of data, or identity theft. Every year, malware causes damage of millions of dollars worldwide. The main reason is that users dont install critical software or Windows updates, allowing malware to exploit loopholes that have long been patched. Vulnerabilities can potentially be exploited within hours of them becoming publicly known. So once a security update is available, you should immediately install the fix to protect your system from malware attacks.