Finally, I have solved this challenge, but not without a lot of help!
So, for those who, just like me, think that snow stands synonym with fun in wintertime, and a computer works only with a mouse, here some hints (I used Windows 10):
You need to download and unzip a program named Snow on the Darkside webpage (http://www.darkside.com.au/snow/snwdos32.zip). Not the darkside snowboards, that is for the winter fun. It is possible to open this program with a (double) mouse click in the Explorer and it is also possible to copy the, in the meantime found, sentence with the password, as described above. But that doesn’t work! Whatever you try, and I tried a hell of a lot combinations, it`s a No GO.
Instead, first of all make sure that the Snow program and the Snow text (also downloaded and unzipped) with the empty lines at the end are put in the same folder on your computer.
Secondly, you should go to the Command Prompt, forget the name. Click on Windows Symbol and R simultaneously and in the pop up window you type: CMD. Then Enter. Now you are in some black window with a blinking cursor. Somehow you need to go to the directory where the snow program and text are placed. On Internet you will find all kind of information like: Basic commands for dummies
, or The 10 most easy commands which even you mother knows
, or Becoming a Geek in 5 minutes
. When you are in the right directory, you should not open (execute) the snow program without the adequate parameters because then the same happens as double click with the mouse in the Explorer and that doesn`t work. Instead, the sentence with the password should be written directly in this command prompt (the parameters look like this: snow -C -p "Welcome …" snow.txt), followed by Enter, where snow.txt means the additional file copied from MTC3 into the directory with snow.exe.
In my attempts I didn´t know where the clear text would appear. But this text shows right under the command line in the same command prompt. Not in another directory or whatever. So, if the hidden text does not appear in the black window, something is wrong [HTML_REMOVED]
Good luck ! Silva