Windows 7 business users must upgrade to Windows 10 before it’s too late. Once Windows 7 reaches End of Life (EOL) on January 14, 2020, Microsoft will stop releasing critical security updates, leaving businesses at risk of malware and other threats. Although Enterprise and Pro users can pay for the extended security updates (ESU) past EOL, this can get prohibitively expensive, and it’s only meant to serve as a stopgap for enterprises that can’t upgrade all their systems on time.