Hi guys, there's a few threads, i hope this is useful in this one:
I just used this installer: Videoconferencing and Video Capture Tools
I use w7x64, it installed here: "C:\Program Files\Movie Maker".
According to "Worthytips.com" it works for x64 and 32bit. Fresh Install Windows Movie Maker 6.0 in Windows 7 with Windows Movie Maker Installer
Note: Both Windows Live Movie Maker and Windows Movie Maker 6.0 may be installed side-by-side if needed. This installer supports both 32-bit and 64-bit platforms.
Seems to work fine, but i haven't used it extensively as yet.
I ran MalwareBytes and MSE on the installer, then on the whole system: no issues detected. I always worry about such things.