Video Editing Software

Do not purchase AVS4YOU products. They have draconian and misleading licencing practices. They do not allow transferring software to a replacement PC, even if you take it off the old one. Not recommended. https://online-media-technologies.pissedconsumer.com/avs-4-you-subscription-scam-20100115167874.html In fact, everything about this company reeks malware and hackers. Their site goes to mc.yandex.ru when downloading software. (This is opinion only, not a known fact)

For video try Microsoft Movie Maker. It is good and free.
or
https://www.freemake.com/. Take your time on the install so you do not install the extra PUP software.

For audio try Media Monkey.