You can test archives in PowerArchiver using a couple different methods.
You can use the „Test“ button on the toolbar to test the integrity of an open archive (Classic interface: „Test…“ entry in the „Actions“ menu) . A dialog box is displayed with the results of the test operation.
You can enable „Test“ in Explorer shell extensions by checking the „Test“ option in „Options > Configuration > Explorer Shell Extensions“. You will now be able to right click on one or several archives in Windows Explorer and select „Test“ in order to test those archives.