As SBK stated about uninstalling it from the harddrive, that would be the best to start with. You can always try to reinstall it.
If that doesn't solve it there may be something wrong internally since you bought a new copy and it's still continually doing this!
So confused why you labeled the topic "British", posted a link which I don't know how you acquired, and then replied to someone with your Youtube channel...purpose being?
I think a Dazzle HD has decent quality... but depends how serious your going to be with it. I'd only buy a HD PVR if you plan on making somewhat of a profession out of it.