Hello a bit late to the party, A dll missing should be fairly easy to fix, it's usually a version of directx or something like that, that you are missing. try googling it.
Lightworks is a proffesional video editing software that has been used for some pretty big titles such as Braveheart, Good will hunting and Pulp fiction. This is their website https://www.lwks.com/ It's free although you will have to pay something like 60USD to have the patentent codecs included. (also runs on linux)
If you want free no trial period or pay for full features video editing software, i would actually suggest dual booting linux. They have some pretty good free ones over there.
Linux: OpenShot: http://www.openshot.org/I guess you could call it the movie maker of linux.
Linux: My personal favorite for linux. Kdenlive https://kdenlive.org/It has some pretty nice options and are more than suffecient for what you need right now.
Additionally VLC has a video editor in development http://www.videolan.org/vlmc/I can't find a download link right now, but i know for a fact that i downloaded and used it a 6 months ago. Maybe you can find it somewhere.
Edit: There is always the option of getting the 30 day trial of Premiere pro http://www.adobe.com/products/premiere.html It was fully featured with no restrictions when i tried it a couple of years ago. Can only imagine it's still the case. only difference is a pop up when you launch telling you how many days you got left. Could be a solution while you look for a more permanent one. No credit card needed or anything binding (at least not 2 years ago)
Just remember to save often as these programs tend to crash, even premiere pro.
Sebby got a reaction from werto165 in Best video editing software for my situation
