Ignoring Windows updates exposes systems to rising security risks as older versions approach end of support

Delaying Windows updates leaves known security flaws unpatched, increasing vulnerability to malware, ransomware, and system breaches, particularly as older operating systems near end-of-life.

Skipping Windows updates may feel harmless when a machine still seems to work, but the choice leaves known security flaws exposed. Microsoft uses Windows Update not only to add features but to close vulnerabilities that attackers can already study once a fix is available. That can open the door to remote code execution, privilege escalation, ransomware and even low-level system compromise.

The risk is not theoretical. Microsoft said in 2017 that WannaCrypt ransomware spread by exploiting unpatched Windows systems after the underlying SMBv1 flaw had already been fixed in March that year. Security reporting from TechTarget and Cloudflare says the outbreak affected hundreds of thousands of computers worldwide, disrupting hospitals, factories and businesses. The lesson was clear: systems that miss updates are often the first to be hit when malware starts moving.

A similar pattern emerged with PrintNightmare, CVE-2021-34527. Rapid7 reported that proof-of-concept exploits circulated in June 2021, Microsoft clarified the issue on July 1 and then issued out-of-band patches after evidence of active exploitation. The sequence showed how quickly a disclosed flaw can become dangerous for users who delay installing updates.

The problem is becoming more acute as older versions age out of support. Microsoft has warned that original Secure Boot certificates are expiring in June 2026 and that unsupported Windows installations, including Windows 10 and earlier, can end up in a degraded security state without certificate updates. In practical terms, the safest approach remains the simplest: install updates promptly, restart when asked and keep unsupported systems off the internet whenever possible.