I have been using Replay A/V for years. What worked really well was running it on a laptop that could be in standby/sleep mode and it would awake for the recording. Then it stopped working in this way - at or around the time I upgraded my system to Windows 7.

Now my laptop has to be on and running for the recording to start. Indeed if the laptop is sleeping and I open the lid and awake it and it is part way through the scheduled recording, it starts recording instantly from the point at which I awoke the system.

I could not find any reference to sleep in a search and so I post this item to see if anyone else has seen this. Note that I did also ask tech support and they asked me to change my UAC setting which did not fix it. They also said they had heard of the problem and felt it seemed to be specific to W7 but that they had been unable to reproduce it.