If you are always using Windows OS, Please be aware about Linux. Don't hesitate to use it. It is amazing and super good OS than Windows.
You people (Windows People) are using Windows Movie Maker for Video Editing purpose. It is built in with Windows.
VirtualDub is 100% freeware application to do Video Editing for Windows.
Like that We have more Freeware applications to do Video Editing in Linux.
These applications are 100% freeware and Open Source too.
[Avialbale for Windows Too.]
6. LiVES Video Editor