Not able to open newly installed version of Creo 10 due to error -21

[KB_10760553]

Hi Guys, 

I installed the educational free version of Creo 10 and I am not able to use the software due to the following error pop up that appears when I attempt to open the software. I need a solution to this asap, please help me out.

[VladimirN]

Did you use this code for Creo 10? Link: https://community.ptc.com/t5/PTC-Education-Forum/Creo-Student-v10-free-license/m-p/892274/highlight/true#M13818

[MartinHanak]

https://community.ptc.com/t5/PTC-Education-Forum/Licence-request-failed-for-feature/td-p/894138