Recently, i found that I had no sound - at all. I tried to run the diagnostic tool and got a mssg that said "A problem is preventing the troubleshooter from starting" and there was an error code 0x800706F7. Now I have two problems - no troubleshooter AND no sound. I investigated all possibilities that I could think about (drivers all current, all devices report being used or functioning), investigated the code and found that it "could" be related to a windows update, but the update was never actually loaded (reported as failed) and been trying everything I know to get a handle on this. NOW, can you guys help?