I am having this same problem with my HR44-700. This is the only piece of equipment that I have and this all started about 5 days ago. Anytime I hit any button on my remote it lags on the receiver from 5-20 seconds. When it first pulls up the channel guide it just stays with a blue screen for about 30 seconds.
I have read every forum that I can find on the internet and have tried every reset, setting change, and system check that I could find. I was wondering if anybody else has seen this on the 44?