--- a/toolkit/modules/GMPUtils.jsm
+++ b/toolkit/modules/GMPUtils.jsm
@@ -76,24 +76,16 @@ this.GMPUtils = {
     if (Services.appinfo.OS != "WINNT") {
       // Non-Windows OSes currently unsupported.
       this.maybeReportTelemetry(aPlugin.id,
                                 "VIDEO_EME_ADOBE_UNSUPPORTED_REASON",
                                 GMPPluginUnsupportedReason.NOT_WINDOWS);
       return false;
     }
 
-    if (Services.sysinfo.getPropertyAsInt32("version") < 6) {
-      // Windows versions before Vista are unsupported.
-      this.maybeReportTelemetry(aPlugin.id,
-                                "VIDEO_EME_ADOBE_UNSUPPORTED_REASON",
-                                GMPPluginUnsupportedReason.WINDOWS_VERSION);
-      return false;
-    }
-
     return true;
   },
 
   /**
    * Checks whether or not a given plugin is forced visible. This can be used
    * to test plugins that aren't yet supported by default on a particular OS.
    * @param   aPlugin
    *          The plugin to check.