Static and popping during audio playback

I posted this in Home Studio by accident.  I have recently discovered that the problem occurs in all audio playback. Thanks for any help.
 
I have Sonar X1 Essentials with wdos7 64 bit. I am using a Line6 UX2 interface with pod farm. It has worked fine for a couple years.  Now when I play back a multi track CW project it pops, skips, or burps.  It sounds like an over driven track (for a millisecond) but there are not overdriven tracks.  I tried changing the buffer speeds but it still does the same thing.  I updated the drivers for the UX2 and still the same thing. It is never in the same spot (measure) and happens on my r MP3 saved on my computer and also on the songs forum.  Any ideas?  Oh, how are y'all?
 

Thanks, Cjay.  Nice to hear from you and thanks for the info.  I'll get that info.