diff --git a/windows/security/threat-protection/intelligence/prevent-malware-infection.md b/windows/security/threat-protection/intelligence/prevent-malware-infection.md
index 3659eaeffb..7bce69882c 100644
--- a/windows/security/threat-protection/intelligence/prevent-malware-infection.md
+++ b/windows/security/threat-protection/intelligence/prevent-malware-infection.md
@@ -85,6 +85,8 @@ To further ensure that data is protected from malware as well as other threats:
 
 * Do not use untrusted devices to log on to email, social media, and corporate accounts.
 
+* Avoid downloading or running older apps. Some of these apps might have vulnerabilities. Also, older file formats for Office 2003 (.doc, .pps, and .xls) allow macros or run. This could be a security risk.
+
 ## Software solutions
 
 Microsoft provides comprehensive security capabilities that help protect against threats. We recommend: