Meteor isn't working on Windows7 64 bit

I am just trying out Meteor on my Windows 7 enterprise 64 bit box. I installed it via MSI from http://win.meteor.com, rebooted the machine and in command prompt (administrator), did the following:

cd /d c:\var
meteor create testapp
(absolutely no response on console)

Then I insured that node.exe is working. I created a test.js with basic hello world example and it worked (I browsed to the localhost:xxx and was greeted).

node test.js

Then I went right into the meteor.js code, and upon encountering process.stderr.write inside fiber(...), I decided to call the same at the beginning of the file outside fiber.
process.stderr.write("outside fiber");
(this message got printed ; confirmed that there is a problem with fibers)

Now upon research, I stumble upon

npm test fibers
(output: Error: Test already-running.js failed. code: -1073741819 ....)

Then I did

npm remove fibers
npm install fibers

However, the error with test fiber continues so does the absolute no-output from meteor command.

could anybody help? I'm out of options and this is my first attempt at meteor/nodejs.