Lock your Folder. If you want to save your personal files in a folder at home or in office, then you must lock that folder. There is much software available in market to lock folder but I am telling you a new trick which locks a folder without any software. At first create a folder in any drive in which you want to keep your personal files. For example in drive E: create a folder and rename it. You can write any name that you like. Here we write folder name “personal”. Now create a text file in the same drive. Type, ren personal personal.{21EC2020-3AEA-1069-A2DD-08002B30309D} Save this text file as (hide.bat), you will see a bat file in the drive. Now again create another text file and type… ren personal.{21EC2020-3AEA-1069-A2DD-08002B30309D} personal Save this text file as unhide.bat. Done. Now press “hide” and the “personal” folder will change to control penal and nobody can see its contents. Press “unhide” and….waooooo. you can see your folder in original shape.