Microsoft Windows Movie Maker is no longer available, it has been replaced by Windows Live Movie Maker.
Also (.mswmm) files can only be open using MSWMM - MLMM is compatible with these files.
First question - Do you have a Microsoft account, WLMM is an online program and you need a MS Acct. to access & use it. I have included the MS Acct website in case you do not have one, if and you decide to sign up;
There are available on the web, Converter programs that will convert (.mswmm) folders to other formats that Windows can use- if you do a web search
'convert mswmm files' in will list where you can get the programs.
A computer is a device, that requires human input to operate efficiently. Alas we humans do fail!!!!
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