Hello Friend...

First time Go To                   UIDAI Website 
                                                        ↓

                                                 My Aadhar
                                                        ↓
                              
                                                  Download                                                                         

you must be received of aadhar card Slip or Aadhar Card no or Virtual Id or Enrollment Id (at time of apply). then must be aadhar card with registered mobile no (at time of apply Aadhar Card ).If you have .you can easy download.

Follow procedure 
Step(1):-Go to UIDAI Website.
Step(2):-Select to My Aadhar.(Menu)
Step(3):-Click on Download.
Step(4):-Select on Upper Side Aadhar Card no or Virtual Id or Enrollment Id .
Step(5)a:-If Select on Upper Side Aadhar Card no. Then Enter your Aadhar Card No.
                                              or
Step(5)b:-If Select on Upper Side Enrollment Id(EID) no. Then Enter your Enrollment Id(EID) no.
                                              or
Step(5)c:-If Select on Upper Side Virtual Id(VID) no. Then Enter your Virtual Id(VID) no.
Note-Any One Select 5(a)/5(b)/5(c) as per your choice.
Step(6):- Do not Select it Option (I want a masked Aadhaar?)

Step(7):- Enter Your Capture Code.
Step(8):- Click on Send OTP.
Step(9):- Enter Your OTP. after Reflect some option for survey.given ans as per our according.
Step(10):-verify & Download
Step(11):-Open your Download file Enter  Four Capital Latter Your Name and after Enter Date of Birth Year.Like as-XXXX1111

                            Easy to learn....