Possible or Partial Solution for EZ Drummer 2 Issues

I closed Sonar and opened EZ Drummer 2 in stand-alone mode.  In Settings I saw that audio was set to MME.  I changed this to ASIO and closed EZ Drummer 2.  Then I opened one of the corrupted Sonar projects and it played without problems.
 
If routing is messed up (Ins/Outs going to the wrong things) in instrument tracks, that is still a pain but can be fixed by splitting the tracks and fixing the Ins and Outs.  The problem I was having in addition to that was 1-no audio for some VIs or 2-no audio at all 3-unable to freeze/unfreeze some synths and 4-crashes.  The change from MME to ASIO in standalone seems to have fixed these.  I will continue to monitor things and let you know.
 
I don't know if this is a 100% solution, but you should take a look if you are having issues.  Just remember that you always need to close Sonar before opening a synth in standalone.

Sweetwater installed Acronis but whenever I have tried to take an image, it was unclear what to do and I didn't want to wipe out my machine. I will look for documentation. Thanks.

Thanks for the consolation and commiseration!  The deal with Acronis is that every time I start to take an image, I get to a screen with a couple of unclear choices, both of which look like they MIGHT be taking me back to a previous image—which would really be bad.
 
Sweetwater set up the PC but didn't really have any instructions for Acronis, which I understand: it's not their product.
 
I will absolutely figure this out though in case, God Forbid, I should get a virus or some other horrible problem.
 
In the meantime, Toontrack MUST resolve this or it will really hurt their company.  The fact that they are ignoring forum posts is not a good sign.  They may be heads-down working on this, but leaving people hanging with no information is NOT the way to handle it. 
 
I am still convinced it is something to do with the audio driver set-up.