Hi Nayan,
Are you able to install Windows Updates?
The common two causes of this issue can be:
a. Microsoft Account has not been verified yet on your computer.
b. Date and time on your computer is set incorrectly.
The store app uses https instead of http which is used by other apps, so in order for the SSL handshake to proceed, the clock on the client and server needs to be correct.
Follow these methods and check if it helps.
**Method 1:**Follow the steps below to check if the date and time are set correctly.
a) In the Start screen type “Date and Time”, and click on date and time settings.
b) Check if the date and time is set correctly.
**Method 2:**Follow the steps below to finish 2 step verification process
a. Close the Store app completely (swipe down from the top)
b. Press “Windows + C” to open the charms bar, click on settings and then on “change PC settings”.
c. Click on Accounts, It will show your Microsoft account there.
d. See if there is a “verify” link below your account. If so, click on it and go through the 2 step verification process
e. Once done try starting the store and check if you are able to visit Windows Store.
Let us know if it helps. If the issue persists, please reply, we will be happy to assist you further.