DEar Paramita, there is another site www.dopdf.com from where you can download the pdf converter s/w to your machine. After installing it to your machine, it's very easy to convert your word document into PDF format:
1> save your word document.
2> give print command from File menu.
3> change the printer option to dopdf.
4> select the destination file name and path.
5> press ok
Your file is now in pdf format, but to open it, you must have Adobe Acrobat's latest version installed into your machine. Pl be sure about it.