Recording a webinar

I'm going to be a part of a webinar on Tuesday 9/2 where the person logs into my computer and teaches me how to use a program I have installed on it. Is there a way to record the movements on my screen, and microphone sound while it's going on? I'd like freeware, I'll only ever do it once, most likely.

Thanks.

 

Thanks Halo. I tried the first one yesterday, and I don't know if the file ended up too large, or I didn't give it time to do its thing when I finished recording, but it didn't work. I followed along well enough though. I'll try the other one today.

Thanks again.