Audio crackle/pop when capturing

I tryed Sony Sound Forge 8.0 to take the crackle and pop out of the recorded file. It works, still the sound isn't perfect, but its the best I can get

 

Grasping at straws here...

I have ASUS PVR-416 video capture card, which has Conexant 23880 capture and Conexant 23416 hardware based encoder. I'm also using Intervideo WinDVD creator where I select the Conexant 23880.

However... when I'm capturing, and Ctrl-Alt-Del to Windows Task Manager, it indicates WCreator.exe (intervideo) is using nearly 30% of CPU.

What is going on here? Could this be causing the problem, i.e is Intervideo software decoding? Do you have any other ideas/suggestions.

Other relevevant info is on board sound Realtek AC97, AMD 64 3400+ CPU, 512MB RAM, 200GB IDE Ultra DMA hard drive, NVIDIA GEForce 5200 graphics.

Look forward to your response as I have been pulling my hair out for a few days now.

 

I honestly have no idea, about to give up mine now I think

I have a fair indication that these intervideo programs do use up a considerable amount of cpu.