UPDATE: Reports from readers who have applied this patch suggests that this update doesn't actually fix the problems that readers are experiencing. I'm in communication with Dell now to see what the company has to say.
Seems that Dell's Alienware M17x notebooks have been suffering from a DPC latency issue that's been hitting audio performance. Today, Dell offers customers a fix.
DPC (Deferred Procedure Call) latency issues manifests itself with symptoms such as:
Fortunately, there's a solution:
I’m very happy to share that engineering has discovered a solution for the DPC latency issues on the M17x. This process will resolve the DPC latency problem on all machines with a Dell factory image. Dell can’t guarantee that this solution will resolve issues on machines that have been modified by their owners.
And here's the 3-step fix: