If Adobe Premiere has too steep a learning curve, you might like Adobe Premiere Elements. It is a pared down editing package and not as complex as Adobe Premiere. You can download a free trial here. See here for the system requirements. It is available for Windows 7
All non-linear editing programs are pretty much the same: they are I/O (input/output) programs that ingest media files (motion pictures, stills, audio, graphics, and such), allow you to arrange them in a timeline and output them to a media stream (file, signal, etc.)
The more complex and difficult to learn the NLE, usually the more controls and options you'll have. The more streamlined, usually less options and controls.
I would suggest Avid Media Composer. They also have a Free 30 day trial but the learning curve is as steep as FCP & Premiere - which are not too bad - but less than DaVinci Resolve.
Note that whichever software you choose, a lot of non-linear editing software requires a minimum of 8GB or 16GB RAM, as well as specific Graphics processing minimums (e.g. Adobe Premiere, Adobe Elements, BlckMagic's DaVinci Resolve, Apple's Final Cut, Sony Vegas, EditShare's Lightworks, etc.)
Aside from these more robust software packages, you might want to check out this review of these freeware options available for Windows: