diff --git a/dlls/wbemprox/builtin.c b/dlls/wbemprox/builtin.c
index 498e3f6fc79..47fc2fb7367 100644
--- a/dlls/wbemprox/builtin.c
+++ b/dlls/wbemprox/builtin.c
@@ -393,6 +393,7 @@ static const struct column col_stdregprov[] =
     { L"EnumKey",        CIM_FLAG_ARRAY|COL_FLAG_METHOD },
     { L"EnumValues",     CIM_FLAG_ARRAY|COL_FLAG_METHOD },
     { L"GetStringValue", CIM_FLAG_ARRAY|COL_FLAG_METHOD },
+    { L"SetStringValue", CIM_FLAG_ARRAY|COL_FLAG_METHOD },
 };
 static const struct column col_systemenclosure[] =
 {
@@ -802,6 +803,7 @@ struct record_stdregprov
     class_method *enumkey;
     class_method *enumvalues;
     class_method *getstringvalue;
+    class_method *setstringvalue;
 };
 struct record_sysrestore
 {
@@ -898,6 +900,11 @@ static const struct record_param data_param[] =
     { L"StdRegProv", L"GetStringValue", 1, L"sValueName", CIM_STRING },
     { L"StdRegProv", L"GetStringValue", -1, L"ReturnValue", CIM_UINT32 },
     { L"StdRegProv", L"GetStringValue", -1, L"sValue", CIM_STRING },
+    { L"StdRegProv", L"SetStringValue", 1, L"hDefKey", CIM_SINT32, 0x80000002 },
+    { L"StdRegProv", L"SetStringValue", 1, L"sSubKeyName", CIM_STRING },
+    { L"StdRegProv", L"SetStringValue", 1, L"sValueName", CIM_STRING },
+    { L"StdRegProv", L"SetStringValue", 1, L"sValue", CIM_STRING },
+    { L"StdRegProv", L"SetStringValue", -1, L"ReturnValue", CIM_UINT32 },
     { L"SystemRestore", L"Disable", 1, L"Drive", CIM_STRING },
     { L"SystemRestore", L"Disable", -1, L"ReturnValue", CIM_UINT32 },
     { L"SystemRestore", L"Enable", 1, L"Drive", CIM_STRING },
@@ -930,7 +937,13 @@ static const struct record_quickfixengineering data_quickfixengineering[] =
 
 static const struct record_stdregprov data_stdregprov[] =
 {
-    { reg_create_key, reg_enum_key, reg_enum_values, reg_get_stringvalue }
+    {
+        reg_create_key,
+        reg_enum_key,
+        reg_enum_values,
+        reg_get_stringvalue,
+        reg_set_stringvalue,
+    }
 };
 
 static const struct record_sysrestore data_sysrestore[] =
diff --git a/dlls/wbemprox/reg.c b/dlls/wbemprox/reg.c
index ec5a8191424..46b089ca8e8 100644
--- a/dlls/wbemprox/reg.c
+++ b/dlls/wbemprox/reg.c
@@ -442,3 +442,68 @@ done:
     if (out_params) IWbemClassObject_Release( out_params );
     return hr;
 }
+
+static void set_stringvalue( HKEY root, const WCHAR *subkey, const WCHAR *name, const WCHAR *value, VARIANT *retval )
+{
+    LONG res;
+
+    TRACE("%p, %s, %s, %s\n", root, debugstr_w(subkey), debugstr_w(name), debugstr_w(value));
+
+    res = RegSetKeyValueW( root, subkey, name, REG_SZ, value, (lstrlenW( value ) + 1) * sizeof(*value) );
+    set_variant( VT_UI4, res, NULL, retval );
+}
+
+HRESULT reg_set_stringvalue( IWbemClassObject *obj, IWbemClassObject *in, IWbemClassObject **out )
+{
+    VARIANT defkey, subkey, name, value, retval;
+    IWbemClassObject *sig, *out_params = NULL;
+    HRESULT hr;
+
+    TRACE("%p, %p\n", in, out);
+
+    hr = IWbemClassObject_Get( in, L"hDefKey", 0, &defkey, NULL, NULL );
+    if (hr != S_OK) return hr;
+    hr = IWbemClassObject_Get( in, L"sSubKeyName", 0, &subkey, NULL, NULL );
+    if (hr != S_OK) return hr;
+    hr = IWbemClassObject_Get( in, L"sValueName", 0, &name, NULL, NULL );
+    if (hr != S_OK) return hr;
+    hr = IWbemClassObject_Get( in, L"sValue", 0, &value, NULL, NULL );
+    if (hr != S_OK) return hr;
+
+    hr = create_signature( L"StdRegProv", L"SetStringValue", PARAM_OUT, &sig );
+    if (hr != S_OK)
+    {
+        VariantClear( &name );
+        VariantClear( &subkey );
+        VariantClear( &value );
+        return hr;
+    }
+    if (out)
+    {
+        hr = IWbemClassObject_SpawnInstance( sig, 0, &out_params );
+        if (hr != S_OK)
+        {
+            VariantClear( &name );
+            VariantClear( &subkey );
+            VariantClear( &value );
+            IWbemClassObject_Release( sig );
+            return hr;
+        }
+    }
+
+    set_stringvalue( (HKEY)(INT_PTR)V_I4(&defkey), V_BSTR(&subkey), V_BSTR(&name), V_BSTR(&value), &retval );
+    if (out_params)
+        hr = IWbemClassObject_Put( out_params, L"ReturnValue", 0, &retval, CIM_UINT32 );
+
+    VariantClear( &name );
+    VariantClear( &subkey );
+    VariantClear( &value );
+    IWbemClassObject_Release( sig );
+    if (hr == S_OK && out)
+    {
+        *out = out_params;
+        IWbemClassObject_AddRef( out_params );
+    }
+    if (out_params) IWbemClassObject_Release( out_params );
+    return hr;
+}
diff --git a/dlls/wbemprox/wbemprox_private.h b/dlls/wbemprox/wbemprox_private.h
index ac857b859e8..31f41e9fc81 100644
--- a/dlls/wbemprox/wbemprox_private.h
+++ b/dlls/wbemprox/wbemprox_private.h
@@ -248,6 +248,7 @@ HRESULT reg_create_key(IWbemClassObject *, IWbemClassObject *, IWbemClassObject
 HRESULT reg_enum_key(IWbemClassObject *, IWbemClassObject *, IWbemClassObject **) DECLSPEC_HIDDEN;
 HRESULT reg_enum_values(IWbemClassObject *, IWbemClassObject *, IWbemClassObject **) DECLSPEC_HIDDEN;
 HRESULT reg_get_stringvalue(IWbemClassObject *, IWbemClassObject *, IWbemClassObject **) DECLSPEC_HIDDEN;
+HRESULT reg_set_stringvalue(IWbemClassObject *, IWbemClassObject *, IWbemClassObject **) DECLSPEC_HIDDEN;
 HRESULT service_pause_service(IWbemClassObject *, IWbemClassObject *, IWbemClassObject **) DECLSPEC_HIDDEN;
 HRESULT service_resume_service(IWbemClassObject *, IWbemClassObject *, IWbemClassObject **) DECLSPEC_HIDDEN;
 HRESULT service_start_service(IWbemClassObject *, IWbemClassObject *, IWbemClassObject **) DECLSPEC_HIDDEN;