Right click on the Windows icon then select on Computer Management
A popup window will appear
Select “Local Users and Groups” from the left hand side menu
Now, double click on the Users folder
New window will appear like shown below
Right click on Administrator and click on Set Password…
A popup will appear. Click on Proceed button
A small window will appear, where you need to mention New password and on the Confirm password retype the same password again & click on OK button to save it.
Note: A mixture of both uppercase and lowercase letters. A mixture of letters and numbers & Inclusion of at least one special character, e.g., ! @ # ? ] etc