Fix #122544

src/vs/workbench/contrib/preferences/browser/settingsTree.ts

@@ -1593,7 +1593,9 @@ export class SettingTreeRenderers {
 		this.settingActions = [
 			new Action('settings.resetSetting', localize('resetSettingLabel', "Reset Setting"), undefined, undefined, async context => {
 				if (context instanceof SettingsTreeSettingElement) {
-					this._onDidChangeSetting.fire({ key: context.setting.key, value: undefined, type: context.setting.type as SettingValueType });
+					if (!context.isUntrusted) {
+						this._onDidChangeSetting.fire({ key: context.setting.key, value: undefined, type: context.setting.type as SettingValueType });
+					}
 				}
 			}),
 			new Separator(),