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diff --git a/usr.sbin/bhyve/xmsr.c b/usr.sbin/bhyve/xmsr.c
--- a/usr.sbin/bhyve/xmsr.c
+++ b/usr.sbin/bhyve/xmsr.c
@@ -124,6 +124,14 @@
*/
*val = 0x000a1003;
break;
+ case MSR_IA32_FEATURE_CONTROL:
+ /*
+ * Windows guests check this MSR.
+ * Set the lock bit to avoid writes
+ * to this MSR.
+ */
+ *val = IA32_FEATURE_CONTROL_LOCK;
+ break;
default:
error = -1;
break;

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