Hey there, Am sliding into the wonderful world of having a HTPC but things are not going quite as smoothly as I would like them (figuratively and literally). I have a P4 3Mz with an Nvidia 6600GT and have been trying to use Zoom Player using Nvidia 3 codecs along with Nvidia purevideo. Sound is absolutely fine and the picture may be slightly better than my Arcam dv88+ although I don't feel really blown away by it (am connecting with HDMI). But the problem is that the playback is just not smooth. It is fine when there is no movement but if there is slow sweeping movements on screen then the picture will seem to catch slightly as it moves along every second or so. I have tried changing all of the options in zoomplayer (overlay to vm7 to vm9) and even ripping to disk (which bizarrely made the picture worse) but nothing seems to get rid of this very slight judder. Its making me rather annoyed at the moment as I keep looking at this damn pc and then my Arcam and knowing which one gives me a smoother picture at the moment. I had a look at FFDshow but my eyes virtually bled from the many options. Having read on here that Purevideo is a viable alternative to FFDshow I would prefer to use this if I can. Any suggestions as to what I should be doing or options that I should be choosing? Many thanks in advance.