Hello juanmapalad,
can you manually install CLR types for both x86 and x64 architecture and do NPM installation again?
x86: http://go.microsoft.com/fwlink/?LinkID=239643&clcid=0x409
x64: http://go.microsoft.com/fwlink/?LinkID=239644&clcid=0x409
please let us know result, in case of problem we can schedule GoTo meeting for online investigation.
Thank you Tom P.