From the trial and error's I've been doing, Roxio 2012 has a problem loading mpeg 1 and mpeg 2 videos (700x480) normally. If you convert a 2 to 5 hour mpeg 1 and mpeg 2 video to a VCD format after taping something on a TV tuner like Hauppage or something similar to a usb on the market, the VCD format doesn't jam up. If you load an mpeg 1 or mpeg 2 up, you can anticipate a jam up to crash and reload, or, repetitious few second jam ups and then frees itself and then loads normally but still makes the video skip A LOT. VCD doesn't do this, in fact, I've never had a problem with VCD, .wmv or mp4. You can't load avi's because it doesn't accept the format. All you'll see are red lines.
As far as the computer performance goes, I'm also using an hp DV6.That one gives the same results.