PART -I
1--> RIGHT CLICK ON FOLDER.
2--> click on SEND TO.
3--> click on COMPRESSED ZIPPED FOLDER.
4--> A NEW ZIP FOLDER IS CREATED BY DOING SO.
5--> DELETE ORIGINAL FOLDER ( FOLDER WITHOUT ZIP)
PART -II
1--> OPEN THE ZIP FOLDER.
2--> RIGHT CLICK IN BLANK AREA.
3--> click on ADD A PASSWORD.
4--> ADD PASSWORD AND CONFIRM IT.