I haven't used Studio instruments in a while.  SI strings for instance.. Now I went to bring up SI -
Strings and they're nowhere to be found.  I re-scanned my VSTs but still can't find them.  I have ALL versions of Sonar producer so they are somewhere in one of those versions. Do I have to re-install SONAR and EVERYTHING to find the SI synths ?  
 
 
Thanks guys for any help.
 

Did you try the scan options rescan failed plugins and rescan existing plugins?

I had to re-install them.  Don't know why cuz the SI.dll files were all there just didn't work.  After re-install from the Sonar re-install (unchecking everything but the SI instruments).  Thanks for the reply.