diff --git a/windows/registry/key.go b/windows/registry/key.go
index c2564834..906325e0 100644
--- a/windows/registry/key.go
+++ b/windows/registry/key.go
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build windows
 // +build windows
 
 // Package registry provides access to the Windows registry.
@@ -24,6 +25,7 @@ package registry
 
 import (
 	"io"
+	"runtime"
 	"syscall"
 	"time"
 )
@@ -113,6 +115,13 @@ func OpenRemoteKey(pcname string, k Key) (Key, error) {
 // The parameter n controls the number of returned names,
 // analogous to the way os.File.Readdirnames works.
 func (k Key) ReadSubKeyNames(n int) ([]string, error) {
+	// RegEnumKeyEx must be called repeatedly and to completion.
+	// During this time, this goroutine cannot migrate away from
+	// its current thread. See https://golang.org/issue/49320 and
+	// https://golang.org/issue/49466.
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
 	names := make([]string, 0)
 	// Registry key size limit is 255 bytes and described there:
 	// https://msdn.microsoft.com/library/windows/desktop/ms724872.aspx