I have the SW and I never use the audio side of it anymore. But the wonderful thing is it will exist with many other cards. I have it working along with an Echo Mia.
Get an Audiophile 2496 to go along since it will provide lower latency, the SW does 23ms at best. The AP is down to $99 at most places.
GPO will hang but you will have to wait it out. Once it opens change the setting to the WDM drivers. I think it is set to Primary Sound Driver(or something like that) change it to Primary Sound Driver [SW1000 #1 Out] or the ASIO setting and see if that fixes it
Get another card and use the SW for midi. The card will be obsolete with the next Window OS change. Yamaha is no longer developing drivers for this card and XP will be the end of the SW. Mac users were left out as well. Unfortunately Yamaha refuses to let their source code available for the open source community to develope drivers. Such a shame for an outdated but fine piece of hardware.