How to lock a folder in WinXP without any software

It's very simple just follow the steps.

1.Make new folder and name it.I am naming it "folder" as an example.

2.Now open Notepad and copy paste this code in it ren folder folder.{21EC2020-3AEA-1069-A2DD-08002B30309D} and now in Notepad Menu File->"save as".and give it name "lock.bat:".bat is extension.If you have used another name of your folder than in the code above write name of your folder in place of "folder" and "folder".for example if it is abc then above code will be ren abc abc.{21EC2020-3AEA-1069-A2DD-08002B30309D}.

3.Now again open Notepad and copy paste this code ren folder.{21EC2020-3AEA-1069-A2DD-08002B30309D} folder.and save it as "key.bat".If your folder name is different then replace "folder" and "folder" with your folder name.For example if your folder name is abc then above code will be ren abc.{21EC2020-3AEA-1069-A2DD-08002B30309D} abc

4.Now double click the "lock.bat" and it will lock your folder and your folder cannot be accessed by anyone.If you double click on the folder it will take you to control panel.To access the folder double click "key.bat".Now you can hide "key.bat" anywhere on the hard disk and whenever you want to unlock the folder place "key.bat" where the folder is located.