JonPyle, if you look up (in the manual

) the Search dialog topic, you will find a discussion on what is now INDEXED (BookID, Artist, Title). Searching on these fields is now super-fast. Using any other fields, including disabling any of the "Karaoke-Audio-Video" buttons triggers a STRING SEARCH, not an INDEXED search. Using SS will cause the CPU to be tied up more.
However... we have set the "audio thread" to a higher priority than Hoster's core code. Thus, if the audio is about to be starved, other features in Hoster are slowed down while the audio buffers are refilled before audio-dropout would happen.
I'm very glad you found the audio driver is the culprit in your case. I've notified MTUSUPPORT to note this and do a FAQ if his findings are the same.
I'm sorry you had problems. I wish there was some way we could make Hoster "independent" of all the problems users can encounter on a Windows computer. Regretfully, Microsoft is totally ignoring protecting audio playing stream. They used to do better...
Randy McCharles, you are running Hoster 4.11. Go to
http://www.mtu.com/upgrades/hoster.htm and read all the changes since 4.11. There are MASSIVE upgrades, and believe you will find there is PLENTY worth your upgrading. Our 20% discount on upgrades ends midnight tonight, so now is the time to order, even if you don't upgrade immediately during the Holiday Season.