Change Keyboard Shortcut That Changes Abc To Axj

[MichaelHall]

  I sometimes hit the shift & ctrl keys about the same time & the following happens: (C orm.ycm.o ajjce.bynf dcy yd. jypnzodcuy t.fo ) The preceding is a repeat of the first sentence.

Apparently it is a shortcut that changes the keyboard to something else - Greek, Turkish???

I have been unsuccessful at changing it - help!!

 

Mike (Mct." in Greek or Turkish, or whatever.)