I particularly prefer the “Today’s Cloud” definition given by the PC Mag link, as that is what I refer to as the cloud these days – connecting to data not by wires or wireless within the home network, but by using the internet as a highway of travel between two data points.
Anyway, I earlier gave you some ideas of what might be happening. I, and plenty others here have no problems with our WDTV and ISO file playing, and if I did, it could be the unit itself, or something else. When wireless is in the picture it complicates things alot. Is there any way you can temporarily string an ethernet cable to hook your WD to, and see if it works better, wired? Try to be completely wired between data points to create a good test situation, temporarily.
When I first got my WD, I blamed it and cussed it out for a problem that just would not go away – it took a whole year to figure out why sometimes when looking in WD’s menu for “Media servers”, I got the message “there is no media in this folder”. Yes, I tried all the know ways to solve the problem. I finally figured out it was Win 7 not always processing my large music collection completely for sharing, and so I gave it plenty of time to do so. The problem has been gone for well over a year. I believe it was completely fixed by a Windows update somewhere along the way. (Computer problems can often come and go in between Windows updates – a problem is created by an update, and eventually gets fixed by an update.) Same holds true for any product update.
Wireless gadgets can fail, or somewhat fail. Example: I recently determined that the wireless card in my laptop is failing, but not yet completely. The signal strength is more than excellent, but it is not processing the data well; the bandwidth is uneven; giving me poor results at speedtest.net that I can see. Take the wireless away, (house is fully CAT5 wired, anyway) and problem goes away. Bring wireless back and use a different router, and problem is back. Hook a wireless adapter to PC’s ethernet port and wIreless (signals from routers) is fine. Verdict: apparently it’s the PC’s wireless card that is bad.
Finally, I was once an electronic tech in military and for a while afterwards in consumer electronics. Troubleshooting electronic problems is not easy all the time. It’s basically a process of elimination and substituting to narrow down the problem’s culprit.
So, good luck with solving your problem of ISO stuttering.