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Hi Sailesh
My name is Andre Da Costa; an Independent Consultant, Windows Insider MVP and Windows & Devices for IT MVP. I'm here to help you with your problem.
You would need to factory reset your HP laptop in order to reinstall HP Jumpstart.
Here is a thread with steps how to do that;
https://h30434.www3.hp.com/t5/Notebook-Operatin...
Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.