Tonight I installed a new nVidia graphics driver and inadvertently also installed the high def sound driver. What seems to have occurred is that the NV sound driver stomped on my internal sound device, and I had no sound al at all until re-installing the driver for my internal sound device.Now, so far, things appear to be fine again, other than when loading FSX I get the error:"Flight Sim has detected a problem with a third party software program (add-on):Name: PMDGSounds Dynamic Link LibraryVersion: 10.0.61355.62Company: PMDGFile: PMDG\DLLs\PMDGSounds.DLL"I have uninstalled the file FSX.CFG and had FSX rebuild it but still no solution.Any ideas on where to go from here to fix this?Thanks, Bruce Knight.Edit: Seems to be fixed now, I opted "Yes" to run the .dll file in FSX ('no" was recommended), and it seems to have worked OK, not sure what happened.

Glad you got it fixed Bruce, but what do you mean when you say: "no was recommended"? If you mean it looked like it was selected when the yes/no to allow prompt comes up then never mind that and always say yes after installing addons.

Glad you got it fixed Bruce, but what do you mean when you say: "no was recommended"? If you mean it looked like it was selected when the yes/no to allow prompt comes up then never mind that and always say yes after installing addons.

Thanks Dan,This was not the usual "Do you want to run this add-on" message, although I got that after selecting "yes" in the error message (which told me that the .dll file had a problem, did I want to load it anyway, where "no" was recommended).Thanks, Buce.

Ahhh, thanks for the clarification Bruce, I know what you're talking about now. I had an addon causing issues with FSX once and got the same message.