Video editing software

What would be a free or low cost programfor editing software. I only need it for manually cutting out commercials.

I have videoredo installed but on some programs the voice is out of sync after savingwithyout saving and reloading and using the adjust voice drop down box. I have to watch and adjust the setting a little at a time until I get it to sync.

I cah use video redo to do the none editing portion.